Home / 28,102.55-42,142.10-11,451.29

Finding the Fourth Proportional to 28,102.55, 42,142.10 and 11,451.29

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Solution

The fourth proportional to 28,102.55, 42,142.10 and 11,451.29 is: 17,172.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.55 : 42,142.10 = 11,451.29 : x
  2. Step 2: Convert to fraction form
    28,102.55/42,142.10 = 11,451.29/x
  3. Step 3: Cross multiply
    28,102.55x = 42,142.10 × 11,451.29
  4. Step 4: Simplify right side
    28,102.55x = 482,581,140.34
  5. Step 5: Solve for x
    x = 482,581,140.34/28,102.55
  6. Step 6: Final answer
    x = 17,172.15

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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.