Home / 21,329.20-29,435.19-11,897.75

Finding the Fourth Proportional to 21,329.20, 29,435.19 and 11,897.75

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Solution

The fourth proportional to 21,329.20, 29,435.19 and 11,897.75 is: 16,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.20 : 29,435.19 = 11,897.75 : x
  2. Step 2: Convert to fraction form
    21,329.20/29,435.19 = 11,897.75/x
  3. Step 3: Cross multiply
    21,329.20x = 29,435.19 × 11,897.75
  4. Step 4: Simplify right side
    21,329.20x = 350,212,531.82
  5. Step 5: Solve for x
    x = 350,212,531.82/21,329.20
  6. Step 6: Final answer
    x = 16,419.40

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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.