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Finding the Fourth Proportional to 18,677.60, 27,987.18 and 11,737.52

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Solution

The fourth proportional to 18,677.60, 27,987.18 and 11,737.52 is: 17,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.60 : 27,987.18 = 11,737.52 : x
  2. Step 2: Convert to fraction form
    18,677.60/27,987.18 = 11,737.52/x
  3. Step 3: Cross multiply
    18,677.60x = 27,987.18 × 11,737.52
  4. Step 4: Simplify right side
    18,677.60x = 328,500,084.99
  5. Step 5: Solve for x
    x = 328,500,084.99/18,677.60
  6. Step 6: Final answer
    x = 17,587.92

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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.