Home / 20,729.32-31,101.60-12,944.68

Finding the Fourth Proportional to 20,729.32, 31,101.60 and 12,944.68

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Solution

The fourth proportional to 20,729.32, 31,101.60 and 12,944.68 is: 19,421.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.32 : 31,101.60 = 12,944.68 : x
  2. Step 2: Convert to fraction form
    20,729.32/31,101.60 = 12,944.68/x
  3. Step 3: Cross multiply
    20,729.32x = 31,101.60 × 12,944.68
  4. Step 4: Simplify right side
    20,729.32x = 402,600,259.49
  5. Step 5: Solve for x
    x = 402,600,259.49/20,729.32
  6. Step 6: Final answer
    x = 19,421.78

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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.