Home / 20,876.67-28,794.56-15,213.15

Finding the Fourth Proportional to 20,876.67, 28,794.56 and 15,213.15

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Solution

The fourth proportional to 20,876.67, 28,794.56 and 15,213.15 is: 20,983.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.67 : 28,794.56 = 15,213.15 : x
  2. Step 2: Convert to fraction form
    20,876.67/28,794.56 = 15,213.15/x
  3. Step 3: Cross multiply
    20,876.67x = 28,794.56 × 15,213.15
  4. Step 4: Simplify right side
    20,876.67x = 438,055,884.40
  5. Step 5: Solve for x
    x = 438,055,884.40/20,876.67
  6. Step 6: Final answer
    x = 20,983.03

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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.