Home / 20,470.48-28,249.63-13,396.86

Finding the Fourth Proportional to 20,470.48, 28,249.63 and 13,396.86

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Solution

The fourth proportional to 20,470.48, 28,249.63 and 13,396.86 is: 18,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.48 : 28,249.63 = 13,396.86 : x
  2. Step 2: Convert to fraction form
    20,470.48/28,249.63 = 13,396.86/x
  3. Step 3: Cross multiply
    20,470.48x = 28,249.63 × 13,396.86
  4. Step 4: Simplify right side
    20,470.48x = 378,456,304.67
  5. Step 5: Solve for x
    x = 378,456,304.67/20,470.48
  6. Step 6: Final answer
    x = 18,487.91

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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.