Home / 20,350.98-28,081.08-11,398.86

Finding the Fourth Proportional to 20,350.98, 28,081.08 and 11,398.86

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Solution

The fourth proportional to 20,350.98, 28,081.08 and 11,398.86 is: 15,728.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.98 : 28,081.08 = 11,398.86 : x
  2. Step 2: Convert to fraction form
    20,350.98/28,081.08 = 11,398.86/x
  3. Step 3: Cross multiply
    20,350.98x = 28,081.08 × 11,398.86
  4. Step 4: Simplify right side
    20,350.98x = 320,092,299.57
  5. Step 5: Solve for x
    x = 320,092,299.57/20,350.98
  6. Step 6: Final answer
    x = 15,728.59

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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.