Home / 21,112.38-29,108.66-15,442.56

Finding the Fourth Proportional to 21,112.38, 29,108.66 and 15,442.56

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Solution

The fourth proportional to 21,112.38, 29,108.66 and 15,442.56 is: 21,291.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.38 : 29,108.66 = 15,442.56 : x
  2. Step 2: Convert to fraction form
    21,112.38/29,108.66 = 15,442.56/x
  3. Step 3: Cross multiply
    21,112.38x = 29,108.66 × 15,442.56
  4. Step 4: Simplify right side
    21,112.38x = 449,512,151.36
  5. Step 5: Solve for x
    x = 449,512,151.36/21,112.38
  6. Step 6: Final answer
    x = 21,291.40

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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.