Home / 20,926.33-31,389.55-5,131.43

Finding the Fourth Proportional to 20,926.33, 31,389.55 and 5,131.43

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Solution

The fourth proportional to 20,926.33, 31,389.55 and 5,131.43 is: 7,697.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.33 : 31,389.55 = 5,131.43 : x
  2. Step 2: Convert to fraction form
    20,926.33/31,389.55 = 5,131.43/x
  3. Step 3: Cross multiply
    20,926.33x = 31,389.55 × 5,131.43
  4. Step 4: Simplify right side
    20,926.33x = 161,073,278.56
  5. Step 5: Solve for x
    x = 161,073,278.56/20,926.33
  6. Step 6: Final answer
    x = 7,697.16

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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.