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Finding the Fourth Proportional to 10,671.20, 16,006.80 and 6,515.90

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Solution

The fourth proportional to 10,671.20, 16,006.80 and 6,515.90 is: 9,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,671.20 : 16,006.80 = 6,515.90 : x
  2. Step 2: Convert to fraction form
    10,671.20/16,006.80 = 6,515.90/x
  3. Step 3: Cross multiply
    10,671.20x = 16,006.80 × 6,515.90
  4. Step 4: Simplify right side
    10,671.20x = 104,298,708.12
  5. Step 5: Solve for x
    x = 104,298,708.12/10,671.20
  6. Step 6: Final answer
    x = 9,773.85

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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.