Home / 20,247.12-27,931.50-13,170.96

Finding the Fourth Proportional to 20,247.12, 27,931.50 and 13,170.96

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Solution

The fourth proportional to 20,247.12, 27,931.50 and 13,170.96 is: 18,169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,247.12 : 27,931.50 = 13,170.96 : x
  2. Step 2: Convert to fraction form
    20,247.12/27,931.50 = 13,170.96/x
  3. Step 3: Cross multiply
    20,247.12x = 27,931.50 × 13,170.96
  4. Step 4: Simplify right side
    20,247.12x = 367,884,669.24
  5. Step 5: Solve for x
    x = 367,884,669.24/20,247.12
  6. Step 6: Final answer
    x = 18,169.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.