Home / 20,350.50-28,084.59-11,397.81

Finding the Fourth Proportional to 20,350.50, 28,084.59 and 11,397.81

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Solution

The fourth proportional to 20,350.50, 28,084.59 and 11,397.81 is: 15,729.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.50 : 28,084.59 = 11,397.81 : x
  2. Step 2: Convert to fraction form
    20,350.50/28,084.59 = 11,397.81/x
  3. Step 3: Cross multiply
    20,350.50x = 28,084.59 × 11,397.81
  4. Step 4: Simplify right side
    20,350.50x = 320,102,820.75
  5. Step 5: Solve for x
    x = 320,102,820.75/20,350.50
  6. Step 6: Final answer
    x = 15,729.48

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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.