Home / 8,721.40-13,079.70-3,527.80

Finding the Fourth Proportional to 8,721.40, 13,079.70 and 3,527.80

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Solution

The fourth proportional to 8,721.40, 13,079.70 and 3,527.80 is: 5,290.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.40 : 13,079.70 = 3,527.80 : x
  2. Step 2: Convert to fraction form
    8,721.40/13,079.70 = 3,527.80/x
  3. Step 3: Cross multiply
    8,721.40x = 13,079.70 × 3,527.80
  4. Step 4: Simplify right side
    8,721.40x = 46,142,565.66
  5. Step 5: Solve for x
    x = 46,142,565.66/8,721.40
  6. Step 6: Final answer
    x = 5,290.73

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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.