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Finding the Fourth Proportional to 15,616.11, 21,553.59 and 9,949.50

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Solution

The fourth proportional to 15,616.11, 21,553.59 and 9,949.50 is: 13,732.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,616.11 : 21,553.59 = 9,949.50 : x
  2. Step 2: Convert to fraction form
    15,616.11/21,553.59 = 9,949.50/x
  3. Step 3: Cross multiply
    15,616.11x = 21,553.59 × 9,949.50
  4. Step 4: Simplify right side
    15,616.11x = 214,447,443.71
  5. Step 5: Solve for x
    x = 214,447,443.71/15,616.11
  6. Step 6: Final answer
    x = 13,732.45

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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.