Home / 20,757.60-31,132.80-7,603.20

Finding the Fourth Proportional to 20,757.60, 31,132.80 and 7,603.20

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Solution

The fourth proportional to 20,757.60, 31,132.80 and 7,603.20 is: 11,403.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,757.60 : 31,132.80 = 7,603.20 : x
  2. Step 2: Convert to fraction form
    20,757.60/31,132.80 = 7,603.20/x
  3. Step 3: Cross multiply
    20,757.60x = 31,132.80 × 7,603.20
  4. Step 4: Simplify right side
    20,757.60x = 236,708,904.96
  5. Step 5: Solve for x
    x = 236,708,904.96/20,757.60
  6. Step 6: Final answer
    x = 11,403.48

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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.