Home / 20,474.31-28,254.19-11,521.81

Finding the Fourth Proportional to 20,474.31, 28,254.19 and 11,521.81

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Solution

The fourth proportional to 20,474.31, 28,254.19 and 11,521.81 is: 15,899.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.31 : 28,254.19 = 11,521.81 : x
  2. Step 2: Convert to fraction form
    20,474.31/28,254.19 = 11,521.81/x
  3. Step 3: Cross multiply
    20,474.31x = 28,254.19 × 11,521.81
  4. Step 4: Simplify right side
    20,474.31x = 325,539,408.88
  5. Step 5: Solve for x
    x = 325,539,408.88/20,474.31
  6. Step 6: Final answer
    x = 15,899.90

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1.5x scale

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.