Home / 20,456.85-28,193.75-15,142.44

Finding the Fourth Proportional to 20,456.85, 28,193.75 and 15,142.44

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Solution

The fourth proportional to 20,456.85, 28,193.75 and 15,142.44 is: 20,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.85 : 28,193.75 = 15,142.44 : x
  2. Step 2: Convert to fraction form
    20,456.85/28,193.75 = 15,142.44/x
  3. Step 3: Cross multiply
    20,456.85x = 28,193.75 × 15,142.44
  4. Step 4: Simplify right side
    20,456.85x = 426,922,167.75
  5. Step 5: Solve for x
    x = 426,922,167.75/20,456.85
  6. Step 6: Final answer
    x = 20,869.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.