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Finding the Fourth Proportional to 18,007.70, 27,011.55 and 8,619.13

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Solution

The fourth proportional to 18,007.70, 27,011.55 and 8,619.13 is: 12,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.70 : 27,011.55 = 8,619.13 : x
  2. Step 2: Convert to fraction form
    18,007.70/27,011.55 = 8,619.13/x
  3. Step 3: Cross multiply
    18,007.70x = 27,011.55 × 8,619.13
  4. Step 4: Simplify right side
    18,007.70x = 232,816,060.95
  5. Step 5: Solve for x
    x = 232,816,060.95/18,007.70
  6. Step 6: Final answer
    x = 12,928.70

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Similar ratio
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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.