Home / 20,652.66-28,491.35-12,691.98

Finding the Fourth Proportional to 20,652.66, 28,491.35 and 12,691.98

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Solution

The fourth proportional to 20,652.66, 28,491.35 and 12,691.98 is: 17,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.66 : 28,491.35 = 12,691.98 : x
  2. Step 2: Convert to fraction form
    20,652.66/28,491.35 = 12,691.98/x
  3. Step 3: Cross multiply
    20,652.66x = 28,491.35 × 12,691.98
  4. Step 4: Simplify right side
    20,652.66x = 361,611,580.91
  5. Step 5: Solve for x
    x = 361,611,580.91/20,652.66
  6. Step 6: Final answer
    x = 17,509.20

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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.