Home / 20,287.60-30,431.40-5,498.35

Finding the Fourth Proportional to 20,287.60, 30,431.40 and 5,498.35

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Solution

The fourth proportional to 20,287.60, 30,431.40 and 5,498.35 is: 8,247.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.60 : 30,431.40 = 5,498.35 : x
  2. Step 2: Convert to fraction form
    20,287.60/30,431.40 = 5,498.35/x
  3. Step 3: Cross multiply
    20,287.60x = 30,431.40 × 5,498.35
  4. Step 4: Simplify right side
    20,287.60x = 167,322,488.19
  5. Step 5: Solve for x
    x = 167,322,488.19/20,287.60
  6. Step 6: Final answer
    x = 8,247.53

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Half scale
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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.