Home / 21,812.95-30,100.79-12,251.66

Finding the Fourth Proportional to 21,812.95, 30,100.79 and 12,251.66

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Solution

The fourth proportional to 21,812.95, 30,100.79 and 12,251.66 is: 16,906.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,812.95 : 30,100.79 = 12,251.66 : x
  2. Step 2: Convert to fraction form
    21,812.95/30,100.79 = 12,251.66/x
  3. Step 3: Cross multiply
    21,812.95x = 30,100.79 × 12,251.66
  4. Step 4: Simplify right side
    21,812.95x = 368,784,750.69
  5. Step 5: Solve for x
    x = 368,784,750.69/21,812.95
  6. Step 6: Final answer
    x = 16,906.69

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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.