Home / 20,876.88-28,793.30-18,353.60

Finding the Fourth Proportional to 20,876.88, 28,793.30 and 18,353.60

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Solution

The fourth proportional to 20,876.88, 28,793.30 and 18,353.60 is: 25,313.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.88 : 28,793.30 = 18,353.60 : x
  2. Step 2: Convert to fraction form
    20,876.88/28,793.30 = 18,353.60/x
  3. Step 3: Cross multiply
    20,876.88x = 28,793.30 × 18,353.60
  4. Step 4: Simplify right side
    20,876.88x = 528,460,710.88
  5. Step 5: Solve for x
    x = 528,460,710.88/20,876.88
  6. Step 6: Final answer
    x = 25,313.20

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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.