Home / 31,775.20-47,619.60-21,215.20

Finding the Fourth Proportional to 31,775.20, 47,619.60 and 21,215.20

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Solution

The fourth proportional to 31,775.20, 47,619.60 and 21,215.20 is: 31,793.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,775.20 : 47,619.60 = 21,215.20 : x
  2. Step 2: Convert to fraction form
    31,775.20/47,619.60 = 21,215.20/x
  3. Step 3: Cross multiply
    31,775.20x = 47,619.60 × 21,215.20
  4. Step 4: Simplify right side
    31,775.20x = 1,010,259,337.92
  5. Step 5: Solve for x
    x = 1,010,259,337.92/31,775.20
  6. Step 6: Final answer
    x = 31,793.96

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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.