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Finding the Fourth Proportional to 18,616.14, 25,712.19 and 12,317.58

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Solution

The fourth proportional to 18,616.14, 25,712.19 and 12,317.58 is: 17,012.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.14 : 25,712.19 = 12,317.58 : x
  2. Step 2: Convert to fraction form
    18,616.14/25,712.19 = 12,317.58/x
  3. Step 3: Cross multiply
    18,616.14x = 25,712.19 × 12,317.58
  4. Step 4: Simplify right side
    18,616.14x = 316,711,957.30
  5. Step 5: Solve for x
    x = 316,711,957.30/18,616.14
  6. Step 6: Final answer
    x = 17,012.76

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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.