Home / 20,877.15-31,319.18-10,347.66

Finding the Fourth Proportional to 20,877.15, 31,319.18 and 10,347.66

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Solution

The fourth proportional to 20,877.15, 31,319.18 and 10,347.66 is: 15,523.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.15 : 31,319.18 = 10,347.66 : x
  2. Step 2: Convert to fraction form
    20,877.15/31,319.18 = 10,347.66/x
  3. Step 3: Cross multiply
    20,877.15x = 31,319.18 × 10,347.66
  4. Step 4: Simplify right side
    20,877.15x = 324,080,174.38
  5. Step 5: Solve for x
    x = 324,080,174.38/20,877.15
  6. Step 6: Final answer
    x = 15,523.20

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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.