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Finding the Fourth Proportional to 8,691.40, 13,040.88 and 4,306.36

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Solution

The fourth proportional to 8,691.40, 13,040.88 and 4,306.36 is: 6,461.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.40 : 13,040.88 = 4,306.36 : x
  2. Step 2: Convert to fraction form
    8,691.40/13,040.88 = 4,306.36/x
  3. Step 3: Cross multiply
    8,691.40x = 13,040.88 × 4,306.36
  4. Step 4: Simplify right side
    8,691.40x = 56,158,724.00
  5. Step 5: Solve for x
    x = 56,158,724.00/8,691.40
  6. Step 6: Final answer
    x = 6,461.41

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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.