Home / 21,289.88-29,377.80-13,112.18

Finding the Fourth Proportional to 21,289.88, 29,377.80 and 13,112.18

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Solution

The fourth proportional to 21,289.88, 29,377.80 and 13,112.18 is: 18,093.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.88 : 29,377.80 = 13,112.18 : x
  2. Step 2: Convert to fraction form
    21,289.88/29,377.80 = 13,112.18/x
  3. Step 3: Cross multiply
    21,289.88x = 29,377.80 × 13,112.18
  4. Step 4: Simplify right side
    21,289.88x = 385,206,854.72
  5. Step 5: Solve for x
    x = 385,206,854.72/21,289.88
  6. Step 6: Final answer
    x = 18,093.43

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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.