Home / 21,385.80-32,061.36-8,915.17

Finding the Fourth Proportional to 21,385.80, 32,061.36 and 8,915.17

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Solution

The fourth proportional to 21,385.80, 32,061.36 and 8,915.17 is: 13,365.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.80 : 32,061.36 = 8,915.17 : x
  2. Step 2: Convert to fraction form
    21,385.80/32,061.36 = 8,915.17/x
  3. Step 3: Cross multiply
    21,385.80x = 32,061.36 × 8,915.17
  4. Step 4: Simplify right side
    21,385.80x = 285,832,474.83
  5. Step 5: Solve for x
    x = 285,832,474.83/21,385.80
  6. Step 6: Final answer
    x = 13,365.53

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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.