Home / 21,318.19-29,419.10-11,886.55

Finding the Fourth Proportional to 21,318.19, 29,419.10 and 11,886.55

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Solution

The fourth proportional to 21,318.19, 29,419.10 and 11,886.55 is: 16,403.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.19 : 29,419.10 = 11,886.55 : x
  2. Step 2: Convert to fraction form
    21,318.19/29,419.10 = 11,886.55/x
  3. Step 3: Cross multiply
    21,318.19x = 29,419.10 × 11,886.55
  4. Step 4: Simplify right side
    21,318.19x = 349,691,514.70
  5. Step 5: Solve for x
    x = 349,691,514.70/21,318.19
  6. Step 6: Final answer
    x = 16,403.44

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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.