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Finding the Fourth Proportional to 27,653.80, 41,480.70 and 18,905.80

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Solution

The fourth proportional to 27,653.80, 41,480.70 and 18,905.80 is: 28,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,653.80 : 41,480.70 = 18,905.80 : x
  2. Step 2: Convert to fraction form
    27,653.80/41,480.70 = 18,905.80/x
  3. Step 3: Cross multiply
    27,653.80x = 41,480.70 × 18,905.80
  4. Step 4: Simplify right side
    27,653.80x = 784,225,818.06
  5. Step 5: Solve for x
    x = 784,225,818.06/27,653.80
  6. Step 6: Final answer
    x = 28,358.70

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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.