Home / 21,109.62-29,135.19-13,565.39

Finding the Fourth Proportional to 21,109.62, 29,135.19 and 13,565.39

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Solution

The fourth proportional to 21,109.62, 29,135.19 and 13,565.39 is: 18,722.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.62 : 29,135.19 = 13,565.39 : x
  2. Step 2: Convert to fraction form
    21,109.62/29,135.19 = 13,565.39/x
  3. Step 3: Cross multiply
    21,109.62x = 29,135.19 × 13,565.39
  4. Step 4: Simplify right side
    21,109.62x = 395,230,120.27
  5. Step 5: Solve for x
    x = 395,230,120.27/21,109.62
  6. Step 6: Final answer
    x = 18,722.75

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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.