Home / 21,134.78-29,161.22-12,635.49

Finding the Fourth Proportional to 21,134.78, 29,161.22 and 12,635.49

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Solution

The fourth proportional to 21,134.78, 29,161.22 and 12,635.49 is: 17,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,134.78 : 29,161.22 = 12,635.49 : x
  2. Step 2: Convert to fraction form
    21,134.78/29,161.22 = 12,635.49/x
  3. Step 3: Cross multiply
    21,134.78x = 29,161.22 × 12,635.49
  4. Step 4: Simplify right side
    21,134.78x = 368,466,240.52
  5. Step 5: Solve for x
    x = 368,466,240.52/21,134.78
  6. Step 6: Final answer
    x = 17,434.12

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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.