Home / 20,600.76-28,431.90-15,287.16

Finding the Fourth Proportional to 20,600.76, 28,431.90 and 15,287.16

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Solution

The fourth proportional to 20,600.76, 28,431.90 and 15,287.16 is: 21,098.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.76 : 28,431.90 = 15,287.16 : x
  2. Step 2: Convert to fraction form
    20,600.76/28,431.90 = 15,287.16/x
  3. Step 3: Cross multiply
    20,600.76x = 28,431.90 × 15,287.16
  4. Step 4: Simplify right side
    20,600.76x = 434,643,004.40
  5. Step 5: Solve for x
    x = 434,643,004.40/20,600.76
  6. Step 6: Final answer
    x = 21,098.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.