Home / 28,129.11-42,172.68-9,398.06

Finding the Fourth Proportional to 28,129.11, 42,172.68 and 9,398.06

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Solution

The fourth proportional to 28,129.11, 42,172.68 and 9,398.06 is: 14,090.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.11 : 42,172.68 = 9,398.06 : x
  2. Step 2: Convert to fraction form
    28,129.11/42,172.68 = 9,398.06/x
  3. Step 3: Cross multiply
    28,129.11x = 42,172.68 × 9,398.06
  4. Step 4: Simplify right side
    28,129.11x = 396,341,359.53
  5. Step 5: Solve for x
    x = 396,341,359.53/28,129.11
  6. Step 6: Final answer
    x = 14,090.08

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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.