Home / 20,438.31-28,204.98-11,940.93

Finding the Fourth Proportional to 20,438.31, 28,204.98 and 11,940.93

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Solution

The fourth proportional to 20,438.31, 28,204.98 and 11,940.93 is: 16,478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.31 : 28,204.98 = 11,940.93 : x
  2. Step 2: Convert to fraction form
    20,438.31/28,204.98 = 11,940.93/x
  3. Step 3: Cross multiply
    20,438.31x = 28,204.98 × 11,940.93
  4. Step 4: Simplify right side
    20,438.31x = 336,793,691.83
  5. Step 5: Solve for x
    x = 336,793,691.83/20,438.31
  6. Step 6: Final answer
    x = 16,478.55

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1.5x scale

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.