Home / 31,275.09-43,143.48-21,200.13

Finding the Fourth Proportional to 31,275.09, 43,143.48 and 21,200.13

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Solution

The fourth proportional to 31,275.09, 43,143.48 and 21,200.13 is: 29,245.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,275.09 : 43,143.48 = 21,200.13 : x
  2. Step 2: Convert to fraction form
    31,275.09/43,143.48 = 21,200.13/x
  3. Step 3: Cross multiply
    31,275.09x = 43,143.48 × 21,200.13
  4. Step 4: Simplify right side
    31,275.09x = 914,647,384.65
  5. Step 5: Solve for x
    x = 914,647,384.65/31,275.09
  6. Step 6: Final answer
    x = 29,245.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.