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Finding the Fourth Proportional to 8,974.80, 13,440.78 and 7,113.60

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Solution

The fourth proportional to 8,974.80, 13,440.78 and 7,113.60 is: 10,653.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.80 : 13,440.78 = 7,113.60 : x
  2. Step 2: Convert to fraction form
    8,974.80/13,440.78 = 7,113.60/x
  3. Step 3: Cross multiply
    8,974.80x = 13,440.78 × 7,113.60
  4. Step 4: Simplify right side
    8,974.80x = 95,612,332.61
  5. Step 5: Solve for x
    x = 95,612,332.61/8,974.80
  6. Step 6: Final answer
    x = 10,653.42

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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.