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Finding the Fourth Proportional to 15,616.62, 21,549.60 and 8,901.18

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Solution

The fourth proportional to 15,616.62, 21,549.60 and 8,901.18 is: 12,282.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,616.62 : 21,549.60 = 8,901.18 : x
  2. Step 2: Convert to fraction form
    15,616.62/21,549.60 = 8,901.18/x
  3. Step 3: Cross multiply
    15,616.62x = 21,549.60 × 8,901.18
  4. Step 4: Simplify right side
    15,616.62x = 191,816,868.53
  5. Step 5: Solve for x
    x = 191,816,868.53/15,616.62
  6. Step 6: Final answer
    x = 12,282.87

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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.