Home / 20,912.22-31,340.65-15,339.48

Finding the Fourth Proportional to 20,912.22, 31,340.65 and 15,339.48

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Solution

The fourth proportional to 20,912.22, 31,340.65 and 15,339.48 is: 22,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.22 : 31,340.65 = 15,339.48 : x
  2. Step 2: Convert to fraction form
    20,912.22/31,340.65 = 15,339.48/x
  3. Step 3: Cross multiply
    20,912.22x = 31,340.65 × 15,339.48
  4. Step 4: Simplify right side
    20,912.22x = 480,749,097.98
  5. Step 5: Solve for x
    x = 480,749,097.98/20,912.22
  6. Step 6: Final answer
    x = 22,988.90

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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.