Home / 20,761.22-31,143.54-8,756.84

Finding the Fourth Proportional to 20,761.22, 31,143.54 and 8,756.84

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Solution

The fourth proportional to 20,761.22, 31,143.54 and 8,756.84 is: 13,135.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.22 : 31,143.54 = 8,756.84 : x
  2. Step 2: Convert to fraction form
    20,761.22/31,143.54 = 8,756.84/x
  3. Step 3: Cross multiply
    20,761.22x = 31,143.54 × 8,756.84
  4. Step 4: Simplify right side
    20,761.22x = 272,718,996.81
  5. Step 5: Solve for x
    x = 272,718,996.81/20,761.22
  6. Step 6: Final answer
    x = 13,135.98

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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.