Home / 21,815.17-32,691.40-9,331.81

Finding the Fourth Proportional to 21,815.17, 32,691.40 and 9,331.81

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Solution

The fourth proportional to 21,815.17, 32,691.40 and 9,331.81 is: 13,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.17 : 32,691.40 = 9,331.81 : x
  2. Step 2: Convert to fraction form
    21,815.17/32,691.40 = 9,331.81/x
  3. Step 3: Cross multiply
    21,815.17x = 32,691.40 × 9,331.81
  4. Step 4: Simplify right side
    21,815.17x = 305,069,828.38
  5. Step 5: Solve for x
    x = 305,069,828.38/21,815.17
  6. Step 6: Final answer
    x = 13,984.30

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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.