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Finding the Fourth Proportional to 8,958.40, 12,344.16 and 6,308.80

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Solution

The fourth proportional to 8,958.40, 12,344.16 and 6,308.80 is: 8,693.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.40 : 12,344.16 = 6,308.80 : x
  2. Step 2: Convert to fraction form
    8,958.40/12,344.16 = 6,308.80/x
  3. Step 3: Cross multiply
    8,958.40x = 12,344.16 × 6,308.80
  4. Step 4: Simplify right side
    8,958.40x = 77,876,836.61
  5. Step 5: Solve for x
    x = 77,876,836.61/8,958.40
  6. Step 6: Final answer
    x = 8,693.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.