Home / 20,403.96-30,542.34-15,711.78

Finding the Fourth Proportional to 20,403.96, 30,542.34 and 15,711.78

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Solution

The fourth proportional to 20,403.96, 30,542.34 and 15,711.78 is: 23,518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.96 : 30,542.34 = 15,711.78 : x
  2. Step 2: Convert to fraction form
    20,403.96/30,542.34 = 15,711.78/x
  3. Step 3: Cross multiply
    20,403.96x = 30,542.34 × 15,711.78
  4. Step 4: Simplify right side
    20,403.96x = 479,874,448.21
  5. Step 5: Solve for x
    x = 479,874,448.21/20,403.96
  6. Step 6: Final answer
    x = 23,518.69

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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.