Home / 20,749.50-31,132.38-7,603.20

Finding the Fourth Proportional to 20,749.50, 31,132.38 and 7,603.20

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Solution

The fourth proportional to 20,749.50, 31,132.38 and 7,603.20 is: 11,407.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.50 : 31,132.38 = 7,603.20 : x
  2. Step 2: Convert to fraction form
    20,749.50/31,132.38 = 7,603.20/x
  3. Step 3: Cross multiply
    20,749.50x = 31,132.38 × 7,603.20
  4. Step 4: Simplify right side
    20,749.50x = 236,705,711.62
  5. Step 5: Solve for x
    x = 236,705,711.62/20,749.50
  6. Step 6: Final answer
    x = 11,407.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.