Home / 11,421.18-15,761.29-6,385.61

Finding the Fourth Proportional to 11,421.18, 15,761.29 and 6,385.61

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Solution

The fourth proportional to 11,421.18, 15,761.29 and 6,385.61 is: 8,812.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.18 : 15,761.29 = 6,385.61 : x
  2. Step 2: Convert to fraction form
    11,421.18/15,761.29 = 6,385.61/x
  3. Step 3: Cross multiply
    11,421.18x = 15,761.29 × 6,385.61
  4. Step 4: Simplify right side
    11,421.18x = 100,645,419.11
  5. Step 5: Solve for x
    x = 100,645,419.11/11,421.18
  6. Step 6: Final answer
    x = 8,812.18

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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.