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Finding the Fourth Proportional to 8,669.58, 12,988.05 and 4,281.90

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Solution

The fourth proportional to 8,669.58, 12,988.05 and 4,281.90 is: 6,414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.58 : 12,988.05 = 4,281.90 : x
  2. Step 2: Convert to fraction form
    8,669.58/12,988.05 = 4,281.90/x
  3. Step 3: Cross multiply
    8,669.58x = 12,988.05 × 4,281.90
  4. Step 4: Simplify right side
    8,669.58x = 55,613,531.30
  5. Step 5: Solve for x
    x = 55,613,531.30/8,669.58
  6. Step 6: Final answer
    x = 6,414.79

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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.