Home / 20,863.67-31,253.82-12,539.18

Finding the Fourth Proportional to 20,863.67, 31,253.82 and 12,539.18

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Solution

The fourth proportional to 20,863.67, 31,253.82 and 12,539.18 is: 18,783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.67 : 31,253.82 = 12,539.18 : x
  2. Step 2: Convert to fraction form
    20,863.67/31,253.82 = 12,539.18/x
  3. Step 3: Cross multiply
    20,863.67x = 31,253.82 × 12,539.18
  4. Step 4: Simplify right side
    20,863.67x = 391,897,274.67
  5. Step 5: Solve for x
    x = 391,897,274.67/20,863.67
  6. Step 6: Final answer
    x = 18,783.72

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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.