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Finding the Fourth Proportional to 10,986.80, 16,481.40 and 10,641.20

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Solution

The fourth proportional to 10,986.80, 16,481.40 and 10,641.20 is: 15,962.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.80 : 16,481.40 = 10,641.20 : x
  2. Step 2: Convert to fraction form
    10,986.80/16,481.40 = 10,641.20/x
  3. Step 3: Cross multiply
    10,986.80x = 16,481.40 × 10,641.20
  4. Step 4: Simplify right side
    10,986.80x = 175,381,873.68
  5. Step 5: Solve for x
    x = 175,381,873.68/10,986.80
  6. Step 6: Final answer
    x = 15,962.96

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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.