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Finding the Fourth Proportional to 18,273.60, 25,217.76 and 10,720.20

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Solution

The fourth proportional to 18,273.60, 25,217.76 and 10,720.20 is: 14,793.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,273.60 : 25,217.76 = 10,720.20 : x
  2. Step 2: Convert to fraction form
    18,273.60/25,217.76 = 10,720.20/x
  3. Step 3: Cross multiply
    18,273.60x = 25,217.76 × 10,720.20
  4. Step 4: Simplify right side
    18,273.60x = 270,339,430.75
  5. Step 5: Solve for x
    x = 270,339,430.75/18,273.60
  6. Step 6: Final answer
    x = 14,793.99

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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.