Home / 21,521.92-32,408.74-18,781.42

Finding the Fourth Proportional to 21,521.92, 32,408.74 and 18,781.42

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Solution

The fourth proportional to 21,521.92, 32,408.74 and 18,781.42 is: 28,281.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.92 : 32,408.74 = 18,781.42 : x
  2. Step 2: Convert to fraction form
    21,521.92/32,408.74 = 18,781.42/x
  3. Step 3: Cross multiply
    21,521.92x = 32,408.74 × 18,781.42
  4. Step 4: Simplify right side
    21,521.92x = 608,682,157.61
  5. Step 5: Solve for x
    x = 608,682,157.61/21,521.92
  6. Step 6: Final answer
    x = 28,281.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.