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Finding the Fourth Proportional to 21,617.31, 32,428.62 and 7,388.14

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Solution

The fourth proportional to 21,617.31, 32,428.62 and 7,388.14 is: 11,083.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.31 : 32,428.62 = 7,388.14 : x
  2. Step 2: Convert to fraction form
    21,617.31/32,428.62 = 7,388.14/x
  3. Step 3: Cross multiply
    21,617.31x = 32,428.62 × 7,388.14
  4. Step 4: Simplify right side
    21,617.31x = 239,587,184.57
  5. Step 5: Solve for x
    x = 239,587,184.57/21,617.31
  6. Step 6: Final answer
    x = 11,083.12

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1.5x scale

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.