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Finding the Fourth Proportional to 9,319.68, 13,979.52 and 8,395.20

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Solution

The fourth proportional to 9,319.68, 13,979.52 and 8,395.20 is: 12,592.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,319.68 : 13,979.52 = 8,395.20 : x
  2. Step 2: Convert to fraction form
    9,319.68/13,979.52 = 8,395.20/x
  3. Step 3: Cross multiply
    9,319.68x = 13,979.52 × 8,395.20
  4. Step 4: Simplify right side
    9,319.68x = 117,360,866.30
  5. Step 5: Solve for x
    x = 117,360,866.30/9,319.68
  6. Step 6: Final answer
    x = 12,592.80

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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.