Home / 20,758.10-31,143.10-10,231.26

Finding the Fourth Proportional to 20,758.10, 31,143.10 and 10,231.26

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Solution

The fourth proportional to 20,758.10, 31,143.10 and 10,231.26 is: 15,349.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.10 : 31,143.10 = 10,231.26 : x
  2. Step 2: Convert to fraction form
    20,758.10/31,143.10 = 10,231.26/x
  3. Step 3: Cross multiply
    20,758.10x = 31,143.10 × 10,231.26
  4. Step 4: Simplify right side
    20,758.10x = 318,633,153.31
  5. Step 5: Solve for x
    x = 318,633,153.31/20,758.10
  6. Step 6: Final answer
    x = 15,349.82

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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.