Home / 21,189.48-29,229.33-13,217.86

Finding the Fourth Proportional to 21,189.48, 29,229.33 and 13,217.86

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Solution

The fourth proportional to 21,189.48, 29,229.33 and 13,217.86 is: 18,233.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.48 : 29,229.33 = 13,217.86 : x
  2. Step 2: Convert to fraction form
    21,189.48/29,229.33 = 13,217.86/x
  3. Step 3: Cross multiply
    21,189.48x = 29,229.33 × 13,217.86
  4. Step 4: Simplify right side
    21,189.48x = 386,349,191.83
  5. Step 5: Solve for x
    x = 386,349,191.83/21,189.48
  6. Step 6: Final answer
    x = 18,233.07

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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.