Home / 21,559.08-32,306.18-12,189

Finding the Fourth Proportional to 21,559.08, 32,306.18 and 12,189

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Solution

The fourth proportional to 21,559.08, 32,306.18 and 12,189 is: 18,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.08 : 32,306.18 = 12,189 : x
  2. Step 2: Convert to fraction form
    21,559.08/32,306.18 = 12,189/x
  3. Step 3: Cross multiply
    21,559.08x = 32,306.18 × 12,189
  4. Step 4: Simplify right side
    21,559.08x = 393,780,028.02
  5. Step 5: Solve for x
    x = 393,780,028.02/21,559.08
  6. Step 6: Final answer
    x = 18,265.16

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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.