Home / 20,359.60-28,091.33-13,642.78

Finding the Fourth Proportional to 20,359.60, 28,091.33 and 13,642.78

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Solution

The fourth proportional to 20,359.60, 28,091.33 and 13,642.78 is: 18,823.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.60 : 28,091.33 = 13,642.78 : x
  2. Step 2: Convert to fraction form
    20,359.60/28,091.33 = 13,642.78/x
  3. Step 3: Cross multiply
    20,359.60x = 28,091.33 × 13,642.78
  4. Step 4: Simplify right side
    20,359.60x = 383,243,838.86
  5. Step 5: Solve for x
    x = 383,243,838.86/20,359.60
  6. Step 6: Final answer
    x = 18,823.74

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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.