Home / 20,841.12-31,252.21-8,989.29

Finding the Fourth Proportional to 20,841.12, 31,252.21 and 8,989.29

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Solution

The fourth proportional to 20,841.12, 31,252.21 and 8,989.29 is: 13,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.12 : 31,252.21 = 8,989.29 : x
  2. Step 2: Convert to fraction form
    20,841.12/31,252.21 = 8,989.29/x
  3. Step 3: Cross multiply
    20,841.12x = 31,252.21 × 8,989.29
  4. Step 4: Simplify right side
    20,841.12x = 280,935,178.83
  5. Step 5: Solve for x
    x = 280,935,178.83/20,841.12
  6. Step 6: Final answer
    x = 13,479.85

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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.