Home / 8,721.20-13,081.71-3,525.86

Finding the Fourth Proportional to 8,721.20, 13,081.71 and 3,525.86

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Solution

The fourth proportional to 8,721.20, 13,081.71 and 3,525.86 is: 5,288.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.20 : 13,081.71 = 3,525.86 : x
  2. Step 2: Convert to fraction form
    8,721.20/13,081.71 = 3,525.86/x
  3. Step 3: Cross multiply
    8,721.20x = 13,081.71 × 3,525.86
  4. Step 4: Simplify right side
    8,721.20x = 46,124,278.02
  5. Step 5: Solve for x
    x = 46,124,278.02/8,721.20
  6. Step 6: Final answer
    x = 5,288.75

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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.