Home / 20,500.38-28,292.66-12,547.90

Finding the Fourth Proportional to 20,500.38, 28,292.66 and 12,547.90

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Solution

The fourth proportional to 20,500.38, 28,292.66 and 12,547.90 is: 17,317.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.38 : 28,292.66 = 12,547.90 : x
  2. Step 2: Convert to fraction form
    20,500.38/28,292.66 = 12,547.90/x
  3. Step 3: Cross multiply
    20,500.38x = 28,292.66 × 12,547.90
  4. Step 4: Simplify right side
    20,500.38x = 355,013,468.41
  5. Step 5: Solve for x
    x = 355,013,468.41/20,500.38
  6. Step 6: Final answer
    x = 17,317.41

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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.