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Finding the Fourth Proportional to 12,056.60, 18,084.90 and 9,140.60

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Solution

The fourth proportional to 12,056.60, 18,084.90 and 9,140.60 is: 13,710.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,056.60 : 18,084.90 = 9,140.60 : x
  2. Step 2: Convert to fraction form
    12,056.60/18,084.90 = 9,140.60/x
  3. Step 3: Cross multiply
    12,056.60x = 18,084.90 × 9,140.60
  4. Step 4: Simplify right side
    12,056.60x = 165,306,836.94
  5. Step 5: Solve for x
    x = 165,306,836.94/12,056.60
  6. Step 6: Final answer
    x = 13,710.90

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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.