Home / 20,749.28-31,104.60-8,266.90

Finding the Fourth Proportional to 20,749.28, 31,104.60 and 8,266.90

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Solution

The fourth proportional to 20,749.28, 31,104.60 and 8,266.90 is: 12,392.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.28 : 31,104.60 = 8,266.90 : x
  2. Step 2: Convert to fraction form
    20,749.28/31,104.60 = 8,266.90/x
  3. Step 3: Cross multiply
    20,749.28x = 31,104.60 × 8,266.90
  4. Step 4: Simplify right side
    20,749.28x = 257,138,617.74
  5. Step 5: Solve for x
    x = 257,138,617.74/20,749.28
  6. Step 6: Final answer
    x = 12,392.65

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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.