Home / 20,865.92-31,257.18-12,541.43

Finding the Fourth Proportional to 20,865.92, 31,257.18 and 12,541.43

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Solution

The fourth proportional to 20,865.92, 31,257.18 and 12,541.43 is: 18,787.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.92 : 31,257.18 = 12,541.43 : x
  2. Step 2: Convert to fraction form
    20,865.92/31,257.18 = 12,541.43/x
  3. Step 3: Cross multiply
    20,865.92x = 31,257.18 × 12,541.43
  4. Step 4: Simplify right side
    20,865.92x = 392,009,734.97
  5. Step 5: Solve for x
    x = 392,009,734.97/20,865.92
  6. Step 6: Final answer
    x = 18,787.08

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1.5x scale

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.