Home / 19,848.78-27,400.68-12,787.20

Finding the Fourth Proportional to 19,848.78, 27,400.68 and 12,787.20

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Solution

The fourth proportional to 19,848.78, 27,400.68 and 12,787.20 is: 17,652.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,848.78 : 27,400.68 = 12,787.20 : x
  2. Step 2: Convert to fraction form
    19,848.78/27,400.68 = 12,787.20/x
  3. Step 3: Cross multiply
    19,848.78x = 27,400.68 × 12,787.20
  4. Step 4: Simplify right side
    19,848.78x = 350,377,975.30
  5. Step 5: Solve for x
    x = 350,377,975.30/19,848.78
  6. Step 6: Final answer
    x = 17,652.37

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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.