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Finding the Fourth Proportional to 8,559.60, 12,839.40 and 7,490.40

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Solution

The fourth proportional to 8,559.60, 12,839.40 and 7,490.40 is: 11,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,559.60 : 12,839.40 = 7,490.40 : x
  2. Step 2: Convert to fraction form
    8,559.60/12,839.40 = 7,490.40/x
  3. Step 3: Cross multiply
    8,559.60x = 12,839.40 × 7,490.40
  4. Step 4: Simplify right side
    8,559.60x = 96,172,241.76
  5. Step 5: Solve for x
    x = 96,172,241.76/8,559.60
  6. Step 6: Final answer
    x = 11,235.60

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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.