Home / 21,823.88-30,115.53-12,869.33

Finding the Fourth Proportional to 21,823.88, 30,115.53 and 12,869.33

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Solution

The fourth proportional to 21,823.88, 30,115.53 and 12,869.33 is: 17,758.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,823.88 : 30,115.53 = 12,869.33 : x
  2. Step 2: Convert to fraction form
    21,823.88/30,115.53 = 12,869.33/x
  3. Step 3: Cross multiply
    21,823.88x = 30,115.53 × 12,869.33
  4. Step 4: Simplify right side
    21,823.88x = 387,566,543.12
  5. Step 5: Solve for x
    x = 387,566,543.12/21,823.88
  6. Step 6: Final answer
    x = 17,758.83

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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.