Home / 11,687.80-17,521.30-4,290.55

Finding the Fourth Proportional to 11,687.80, 17,521.30 and 4,290.55

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Solution

The fourth proportional to 11,687.80, 17,521.30 and 4,290.55 is: 6,432.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.80 : 17,521.30 = 4,290.55 : x
  2. Step 2: Convert to fraction form
    11,687.80/17,521.30 = 4,290.55/x
  3. Step 3: Cross multiply
    11,687.80x = 17,521.30 × 4,290.55
  4. Step 4: Simplify right side
    11,687.80x = 75,176,013.72
  5. Step 5: Solve for x
    x = 75,176,013.72/11,687.80
  6. Step 6: Final answer
    x = 6,432.01

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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.