Home / 20,869.81-31,236.96-15,321.91

Finding the Fourth Proportional to 20,869.81, 31,236.96 and 15,321.91

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Solution

The fourth proportional to 20,869.81, 31,236.96 and 15,321.91 is: 22,933.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.81 : 31,236.96 = 15,321.91 : x
  2. Step 2: Convert to fraction form
    20,869.81/31,236.96 = 15,321.91/x
  3. Step 3: Cross multiply
    20,869.81x = 31,236.96 × 15,321.91
  4. Step 4: Simplify right side
    20,869.81x = 478,609,889.79
  5. Step 5: Solve for x
    x = 478,609,889.79/20,869.81
  6. Step 6: Final answer
    x = 22,933.12

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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.