Home / 20,877.13-31,307.92-8,392.95

Finding the Fourth Proportional to 20,877.13, 31,307.92 and 8,392.95

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Solution

The fourth proportional to 20,877.13, 31,307.92 and 8,392.95 is: 12,586.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.13 : 31,307.92 = 8,392.95 : x
  2. Step 2: Convert to fraction form
    20,877.13/31,307.92 = 8,392.95/x
  3. Step 3: Cross multiply
    20,877.13x = 31,307.92 × 8,392.95
  4. Step 4: Simplify right side
    20,877.13x = 262,765,765.20
  5. Step 5: Solve for x
    x = 262,765,765.20/20,877.13
  6. Step 6: Final answer
    x = 12,586.30

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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.