Home / 20,872.30-31,309.53-10,195.42

Finding the Fourth Proportional to 20,872.30, 31,309.53 and 10,195.42

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Solution

The fourth proportional to 20,872.30, 31,309.53 and 10,195.42 is: 15,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.30 : 31,309.53 = 10,195.42 : x
  2. Step 2: Convert to fraction form
    20,872.30/31,309.53 = 10,195.42/x
  3. Step 3: Cross multiply
    20,872.30x = 31,309.53 × 10,195.42
  4. Step 4: Simplify right side
    20,872.30x = 319,213,808.35
  5. Step 5: Solve for x
    x = 319,213,808.35/20,872.30
  6. Step 6: Final answer
    x = 15,293.66

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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.