Home / 20,811.18-28,719.99-12,432.54

Finding the Fourth Proportional to 20,811.18, 28,719.99 and 12,432.54

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Solution

The fourth proportional to 20,811.18, 28,719.99 and 12,432.54 is: 17,157.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.18 : 28,719.99 = 12,432.54 : x
  2. Step 2: Convert to fraction form
    20,811.18/28,719.99 = 12,432.54/x
  3. Step 3: Cross multiply
    20,811.18x = 28,719.99 × 12,432.54
  4. Step 4: Simplify right side
    20,811.18x = 357,062,424.47
  5. Step 5: Solve for x
    x = 357,062,424.47/20,811.18
  6. Step 6: Final answer
    x = 17,157.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.