Home / 20,904.10-31,355.76-8,423.79

Finding the Fourth Proportional to 20,904.10, 31,355.76 and 8,423.79

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Solution

The fourth proportional to 20,904.10, 31,355.76 and 8,423.79 is: 12,635.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.10 : 31,355.76 = 8,423.79 : x
  2. Step 2: Convert to fraction form
    20,904.10/31,355.76 = 8,423.79/x
  3. Step 3: Cross multiply
    20,904.10x = 31,355.76 × 8,423.79
  4. Step 4: Simplify right side
    20,904.10x = 264,134,337.53
  5. Step 5: Solve for x
    x = 264,134,337.53/20,904.10
  6. Step 6: Final answer
    x = 12,635.53

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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.