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Finding the Fourth Proportional to 9,291.60, 13,937.40 and 8,578.80

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Solution

The fourth proportional to 9,291.60, 13,937.40 and 8,578.80 is: 12,868.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.60 : 13,937.40 = 8,578.80 : x
  2. Step 2: Convert to fraction form
    9,291.60/13,937.40 = 8,578.80/x
  3. Step 3: Cross multiply
    9,291.60x = 13,937.40 × 8,578.80
  4. Step 4: Simplify right side
    9,291.60x = 119,566,167.12
  5. Step 5: Solve for x
    x = 119,566,167.12/9,291.60
  6. Step 6: Final answer
    x = 12,868.20

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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.