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Finding the Fourth Proportional to 10,961.80, 16,445.10 and 5,417.80

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Solution

The fourth proportional to 10,961.80, 16,445.10 and 5,417.80 is: 8,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.80 : 16,445.10 = 5,417.80 : x
  2. Step 2: Convert to fraction form
    10,961.80/16,445.10 = 5,417.80/x
  3. Step 3: Cross multiply
    10,961.80x = 16,445.10 × 5,417.80
  4. Step 4: Simplify right side
    10,961.80x = 89,096,262.78
  5. Step 5: Solve for x
    x = 89,096,262.78/10,961.80
  6. Step 6: Final answer
    x = 8,127.89

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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.