Home / 19,787.88-29,680-6,638.55

Finding the Fourth Proportional to 19,787.88, 29,680 and 6,638.55

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Solution

The fourth proportional to 19,787.88, 29,680 and 6,638.55 is: 9,957.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,787.88 : 29,680 = 6,638.55 : x
  2. Step 2: Convert to fraction form
    19,787.88/29,680 = 6,638.55/x
  3. Step 3: Cross multiply
    19,787.88x = 29,680 × 6,638.55
  4. Step 4: Simplify right side
    19,787.88x = 197,032,164
  5. Step 5: Solve for x
    x = 197,032,164/19,787.88
  6. Step 6: Final answer
    x = 9,957.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.