Home / 20,876.79-28,793.24-18,353.55

Finding the Fourth Proportional to 20,876.79, 28,793.24 and 18,353.55

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Solution

The fourth proportional to 20,876.79, 28,793.24 and 18,353.55 is: 25,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.79 : 28,793.24 = 18,353.55 : x
  2. Step 2: Convert to fraction form
    20,876.79/28,793.24 = 18,353.55/x
  3. Step 3: Cross multiply
    20,876.79x = 28,793.24 × 18,353.55
  4. Step 4: Simplify right side
    20,876.79x = 528,458,078.23
  5. Step 5: Solve for x
    x = 528,458,078.23/20,876.79
  6. Step 6: Final answer
    x = 25,313.19

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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.