Home / 11,421.14-15,761.46-6,385.90

Finding the Fourth Proportional to 11,421.14, 15,761.46 and 6,385.90

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Solution

The fourth proportional to 11,421.14, 15,761.46 and 6,385.90 is: 8,812.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.14 : 15,761.46 = 6,385.90 : x
  2. Step 2: Convert to fraction form
    11,421.14/15,761.46 = 6,385.90/x
  3. Step 3: Cross multiply
    11,421.14x = 15,761.46 × 6,385.90
  4. Step 4: Simplify right side
    11,421.14x = 100,651,107.41
  5. Step 5: Solve for x
    x = 100,651,107.41/11,421.14
  6. Step 6: Final answer
    x = 8,812.70

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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.