Home / 15,813.80-23,691.90-12,876.20

Finding the Fourth Proportional to 15,813.80, 23,691.90 and 12,876.20

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Solution

The fourth proportional to 15,813.80, 23,691.90 and 12,876.20 is: 19,290.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.80 : 23,691.90 = 12,876.20 : x
  2. Step 2: Convert to fraction form
    15,813.80/23,691.90 = 12,876.20/x
  3. Step 3: Cross multiply
    15,813.80x = 23,691.90 × 12,876.20
  4. Step 4: Simplify right side
    15,813.80x = 305,061,642.78
  5. Step 5: Solve for x
    x = 305,061,642.78/15,813.80
  6. Step 6: Final answer
    x = 19,290.85

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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.