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Finding the Fourth Proportional to 8,962.40, 13,375.80 and 8,729.12

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Solution

The fourth proportional to 8,962.40, 13,375.80 and 8,729.12 is: 13,027.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,962.40 : 13,375.80 = 8,729.12 : x
  2. Step 2: Convert to fraction form
    8,962.40/13,375.80 = 8,729.12/x
  3. Step 3: Cross multiply
    8,962.40x = 13,375.80 × 8,729.12
  4. Step 4: Simplify right side
    8,962.40x = 116,758,963.30
  5. Step 5: Solve for x
    x = 116,758,963.30/8,962.40
  6. Step 6: Final answer
    x = 13,027.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.