Home / 20,750.70-31,126.02-8,279.49

Finding the Fourth Proportional to 20,750.70, 31,126.02 and 8,279.49

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Solution

The fourth proportional to 20,750.70, 31,126.02 and 8,279.49 is: 12,419.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.70 : 31,126.02 = 8,279.49 : x
  2. Step 2: Convert to fraction form
    20,750.70/31,126.02 = 8,279.49/x
  3. Step 3: Cross multiply
    20,750.70x = 31,126.02 × 8,279.49
  4. Step 4: Simplify right side
    20,750.70x = 257,707,485.66
  5. Step 5: Solve for x
    x = 257,707,485.66/20,750.70
  6. Step 6: Final answer
    x = 12,419.22

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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.