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Finding the Fourth Proportional to 9,008.49, 13,512.74 and 7,680.09

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Solution

The fourth proportional to 9,008.49, 13,512.74 and 7,680.09 is: 11,520.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,008.49 : 13,512.74 = 7,680.09 : x
  2. Step 2: Convert to fraction form
    9,008.49/13,512.74 = 7,680.09/x
  3. Step 3: Cross multiply
    9,008.49x = 13,512.74 × 7,680.09
  4. Step 4: Simplify right side
    9,008.49x = 103,779,020.95
  5. Step 5: Solve for x
    x = 103,779,020.95/9,008.49
  6. Step 6: Final answer
    x = 11,520.14

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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.