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Finding the Fourth Proportional to 8,986.78, 12,398.16 and 5,448.70

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Solution

The fourth proportional to 8,986.78, 12,398.16 and 5,448.70 is: 7,517.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.78 : 12,398.16 = 5,448.70 : x
  2. Step 2: Convert to fraction form
    8,986.78/12,398.16 = 5,448.70/x
  3. Step 3: Cross multiply
    8,986.78x = 12,398.16 × 5,448.70
  4. Step 4: Simplify right side
    8,986.78x = 67,553,854.39
  5. Step 5: Solve for x
    x = 67,553,854.39/8,986.78
  6. Step 6: Final answer
    x = 7,517.03

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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.