Home / 20,875.35-31,305.25-8,391.17

Finding the Fourth Proportional to 20,875.35, 31,305.25 and 8,391.17

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Solution

The fourth proportional to 20,875.35, 31,305.25 and 8,391.17 is: 12,583.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.35 : 31,305.25 = 8,391.17 : x
  2. Step 2: Convert to fraction form
    20,875.35/31,305.25 = 8,391.17/x
  3. Step 3: Cross multiply
    20,875.35x = 31,305.25 × 8,391.17
  4. Step 4: Simplify right side
    20,875.35x = 262,687,540.10
  5. Step 5: Solve for x
    x = 262,687,540.10/20,875.35
  6. Step 6: Final answer
    x = 12,583.62

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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.