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Finding the Fourth Proportional to 22,224.78, 30,659.92 and 12,787.88

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Solution

The fourth proportional to 22,224.78, 30,659.92 and 12,787.88 is: 17,641.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,224.78 : 30,659.92 = 12,787.88 : x
  2. Step 2: Convert to fraction form
    22,224.78/30,659.92 = 12,787.88/x
  3. Step 3: Cross multiply
    22,224.78x = 30,659.92 × 12,787.88
  4. Step 4: Simplify right side
    22,224.78x = 392,075,192.50
  5. Step 5: Solve for x
    x = 392,075,192.50/22,224.78
  6. Step 6: Final answer
    x = 17,641.35

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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.