Home / 20,868.18-31,260.54-12,543.68

Finding the Fourth Proportional to 20,868.18, 31,260.54 and 12,543.68

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Solution

The fourth proportional to 20,868.18, 31,260.54 and 12,543.68 is: 18,790.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.18 : 31,260.54 = 12,543.68 : x
  2. Step 2: Convert to fraction form
    20,868.18/31,260.54 = 12,543.68/x
  3. Step 3: Cross multiply
    20,868.18x = 31,260.54 × 12,543.68
  4. Step 4: Simplify right side
    20,868.18x = 392,122,210.39
  5. Step 5: Solve for x
    x = 392,122,210.39/20,868.18
  6. Step 6: Final answer
    x = 18,790.44

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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.