Home / 28,565.38-39,420.16-15,990.13

Finding the Fourth Proportional to 28,565.38, 39,420.16 and 15,990.13

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Solution

The fourth proportional to 28,565.38, 39,420.16 and 15,990.13 is: 22,066.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.38 : 39,420.16 = 15,990.13 : x
  2. Step 2: Convert to fraction form
    28,565.38/39,420.16 = 15,990.13/x
  3. Step 3: Cross multiply
    28,565.38x = 39,420.16 × 15,990.13
  4. Step 4: Simplify right side
    28,565.38x = 630,333,483.02
  5. Step 5: Solve for x
    x = 630,333,483.02/28,565.38
  6. Step 6: Final answer
    x = 22,066.34

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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.