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Finding the Fourth Proportional to 27,998.42, 42,002.08 and 9,279.12

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Solution

The fourth proportional to 27,998.42, 42,002.08 and 9,279.12 is: 13,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,998.42 : 42,002.08 = 9,279.12 : x
  2. Step 2: Convert to fraction form
    27,998.42/42,002.08 = 9,279.12/x
  3. Step 3: Cross multiply
    27,998.42x = 42,002.08 × 9,279.12
  4. Step 4: Simplify right side
    27,998.42x = 389,742,340.57
  5. Step 5: Solve for x
    x = 389,742,340.57/27,998.42
  6. Step 6: Final answer
    x = 13,920.15

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Double scale
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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.