Home / 20,861.67-31,250.82-12,537.18

Finding the Fourth Proportional to 20,861.67, 31,250.82 and 12,537.18

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Solution

The fourth proportional to 20,861.67, 31,250.82 and 12,537.18 is: 18,780.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.67 : 31,250.82 = 12,537.18 : x
  2. Step 2: Convert to fraction form
    20,861.67/31,250.82 = 12,537.18/x
  3. Step 3: Cross multiply
    20,861.67x = 31,250.82 × 12,537.18
  4. Step 4: Simplify right side
    20,861.67x = 391,797,155.49
  5. Step 5: Solve for x
    x = 391,797,155.49/20,861.67
  6. Step 6: Final answer
    x = 18,780.72

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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.