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Finding the Fourth Proportional to 8,805.60, 12,139.20 and 6,148.80

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Solution

The fourth proportional to 8,805.60, 12,139.20 and 6,148.80 is: 8,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.60 : 12,139.20 = 6,148.80 : x
  2. Step 2: Convert to fraction form
    8,805.60/12,139.20 = 6,148.80/x
  3. Step 3: Cross multiply
    8,805.60x = 12,139.20 × 6,148.80
  4. Step 4: Simplify right side
    8,805.60x = 74,641,512.96
  5. Step 5: Solve for x
    x = 74,641,512.96/8,805.60
  6. Step 6: Final answer
    x = 8,476.60

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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.