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Finding the Fourth Proportional to 8,878.96, 12,254.46 and 8,485.30

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Solution

The fourth proportional to 8,878.96, 12,254.46 and 8,485.30 is: 11,711.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.96 : 12,254.46 = 8,485.30 : x
  2. Step 2: Convert to fraction form
    8,878.96/12,254.46 = 8,485.30/x
  3. Step 3: Cross multiply
    8,878.96x = 12,254.46 × 8,485.30
  4. Step 4: Simplify right side
    8,878.96x = 103,982,769.44
  5. Step 5: Solve for x
    x = 103,982,769.44/8,878.96
  6. Step 6: Final answer
    x = 11,711.14

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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.