Home / 21,278.91-29,355.60-14,906.61

Finding the Fourth Proportional to 21,278.91, 29,355.60 and 14,906.61

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Solution

The fourth proportional to 21,278.91, 29,355.60 and 14,906.61 is: 20,564.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.91 : 29,355.60 = 14,906.61 : x
  2. Step 2: Convert to fraction form
    21,278.91/29,355.60 = 14,906.61/x
  3. Step 3: Cross multiply
    21,278.91x = 29,355.60 × 14,906.61
  4. Step 4: Simplify right side
    21,278.91x = 437,592,480.52
  5. Step 5: Solve for x
    x = 437,592,480.52/21,278.91
  6. Step 6: Final answer
    x = 20,564.61

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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.