Home / 20,478,358.80-30,717,538.20-18,423,453.60

Finding the Fourth Proportional to 20,478,358.80, 30,717,538.20 and 18,423,453.60

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Solution

The fourth proportional to 20,478,358.80, 30,717,538.20 and 18,423,453.60 is: 27,635,180.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478,358.80 : 30,717,538.20 = 18,423,453.60 : x
  2. Step 2: Convert to fraction form
    20,478,358.80/30,717,538.20 = 18,423,453.60/x
  3. Step 3: Cross multiply
    20,478,358.80x = 30,717,538.20 × 18,423,453.60
  4. Step 4: Simplify right side
    20,478,358.80x = 565,923,139,733,927.50
  5. Step 5: Solve for x
    x = 565,923,139,733,927.50/20,478,358.80
  6. Step 6: Final answer
    x = 27,635,180.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.