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Finding the Fourth Proportional to 8,557.06, 12,839.10 and 3,875.80

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Solution

The fourth proportional to 8,557.06, 12,839.10 and 3,875.80 is: 5,815.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.06 : 12,839.10 = 3,875.80 : x
  2. Step 2: Convert to fraction form
    8,557.06/12,839.10 = 3,875.80/x
  3. Step 3: Cross multiply
    8,557.06x = 12,839.10 × 3,875.80
  4. Step 4: Simplify right side
    8,557.06x = 49,761,783.78
  5. Step 5: Solve for x
    x = 49,761,783.78/8,557.06
  6. Step 6: Final answer
    x = 5,815.29

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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.