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Finding the Fourth Proportional to 15,737.84, 21,718.12 and 8,664.72

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Solution

The fourth proportional to 15,737.84, 21,718.12 and 8,664.72 is: 11,957.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,737.84 : 21,718.12 = 8,664.72 : x
  2. Step 2: Convert to fraction form
    15,737.84/21,718.12 = 8,664.72/x
  3. Step 3: Cross multiply
    15,737.84x = 21,718.12 × 8,664.72
  4. Step 4: Simplify right side
    15,737.84x = 188,181,428.73
  5. Step 5: Solve for x
    x = 188,181,428.73/15,737.84
  6. Step 6: Final answer
    x = 11,957.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.