Home / 20,811.13-31,224.56-12,496.94

Finding the Fourth Proportional to 20,811.13, 31,224.56 and 12,496.94

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Solution

The fourth proportional to 20,811.13, 31,224.56 and 12,496.94 is: 18,750.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.13 : 31,224.56 = 12,496.94 : x
  2. Step 2: Convert to fraction form
    20,811.13/31,224.56 = 12,496.94/x
  3. Step 3: Cross multiply
    20,811.13x = 31,224.56 × 12,496.94
  4. Step 4: Simplify right side
    20,811.13x = 390,211,452.85
  5. Step 5: Solve for x
    x = 390,211,452.85/20,811.13
  6. Step 6: Final answer
    x = 18,750.13

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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.