Home / 21,414.78-29,550.42-11,981.52

Finding the Fourth Proportional to 21,414.78, 29,550.42 and 11,981.52

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Solution

The fourth proportional to 21,414.78, 29,550.42 and 11,981.52 is: 16,533.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,414.78 : 29,550.42 = 11,981.52 : x
  2. Step 2: Convert to fraction form
    21,414.78/29,550.42 = 11,981.52/x
  3. Step 3: Cross multiply
    21,414.78x = 29,550.42 × 11,981.52
  4. Step 4: Simplify right side
    21,414.78x = 354,058,948.24
  5. Step 5: Solve for x
    x = 354,058,948.24/21,414.78
  6. Step 6: Final answer
    x = 16,533.39

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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.