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Finding the Fourth Proportional to 13,616.17, 20,417.91 and 8,935.99

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Solution

The fourth proportional to 13,616.17, 20,417.91 and 8,935.99 is: 13,399.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,616.17 : 20,417.91 = 8,935.99 : x
  2. Step 2: Convert to fraction form
    13,616.17/20,417.91 = 8,935.99/x
  3. Step 3: Cross multiply
    13,616.17x = 20,417.91 × 8,935.99
  4. Step 4: Simplify right side
    13,616.17x = 182,454,239.58
  5. Step 5: Solve for x
    x = 182,454,239.58/13,616.17
  6. Step 6: Final answer
    x = 13,399.82

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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.