Home / 20,787.52-28,685.28-11,354.08

Finding the Fourth Proportional to 20,787.52, 28,685.28 and 11,354.08

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Solution

The fourth proportional to 20,787.52, 28,685.28 and 11,354.08 is: 15,667.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.52 : 28,685.28 = 11,354.08 : x
  2. Step 2: Convert to fraction form
    20,787.52/28,685.28 = 11,354.08/x
  3. Step 3: Cross multiply
    20,787.52x = 28,685.28 × 11,354.08
  4. Step 4: Simplify right side
    20,787.52x = 325,694,963.94
  5. Step 5: Solve for x
    x = 325,694,963.94/20,787.52
  6. Step 6: Final answer
    x = 15,667.81

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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.