Home / 21,184.26-31,778.40-7,143.72

Finding the Fourth Proportional to 21,184.26, 31,778.40 and 7,143.72

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Solution

The fourth proportional to 21,184.26, 31,778.40 and 7,143.72 is: 10,716.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.26 : 31,778.40 = 7,143.72 : x
  2. Step 2: Convert to fraction form
    21,184.26/31,778.40 = 7,143.72/x
  3. Step 3: Cross multiply
    21,184.26x = 31,778.40 × 7,143.72
  4. Step 4: Simplify right side
    21,184.26x = 227,015,991.65
  5. Step 5: Solve for x
    x = 227,015,991.65/21,184.26
  6. Step 6: Final answer
    x = 10,716.26

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1.5x scale

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.