Home / 12,780.14-19,177.62-5,384

Finding the Fourth Proportional to 12,780.14, 19,177.62 and 5,384

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Solution

The fourth proportional to 12,780.14, 19,177.62 and 5,384 is: 8,079.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.14 : 19,177.62 = 5,384 : x
  2. Step 2: Convert to fraction form
    12,780.14/19,177.62 = 5,384/x
  3. Step 3: Cross multiply
    12,780.14x = 19,177.62 × 5,384
  4. Step 4: Simplify right side
    12,780.14x = 103,252,306.08
  5. Step 5: Solve for x
    x = 103,252,306.08/12,780.14
  6. Step 6: Final answer
    x = 8,079.12

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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.