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Finding the Fourth Proportional to 9,143.60, 13,715.40 and 8,841.20

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Solution

The fourth proportional to 9,143.60, 13,715.40 and 8,841.20 is: 13,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,143.60 : 13,715.40 = 8,841.20 : x
  2. Step 2: Convert to fraction form
    9,143.60/13,715.40 = 8,841.20/x
  3. Step 3: Cross multiply
    9,143.60x = 13,715.40 × 8,841.20
  4. Step 4: Simplify right side
    9,143.60x = 121,260,594.48
  5. Step 5: Solve for x
    x = 121,260,594.48/9,143.60
  6. Step 6: Final answer
    x = 13,261.80

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Half scale
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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.