Home / 21,868.14-32,748.91-12,479.79

Finding the Fourth Proportional to 21,868.14, 32,748.91 and 12,479.79

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Solution

The fourth proportional to 21,868.14, 32,748.91 and 12,479.79 is: 18,689.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.14 : 32,748.91 = 12,479.79 : x
  2. Step 2: Convert to fraction form
    21,868.14/32,748.91 = 12,479.79/x
  3. Step 3: Cross multiply
    21,868.14x = 32,748.91 × 12,479.79
  4. Step 4: Simplify right side
    21,868.14x = 408,699,426.93
  5. Step 5: Solve for x
    x = 408,699,426.93/21,868.14
  6. Step 6: Final answer
    x = 18,689.26

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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.