Home / 31,819.47-43,908.29-18,391.59

Finding the Fourth Proportional to 31,819.47, 43,908.29 and 18,391.59

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Solution

The fourth proportional to 31,819.47, 43,908.29 and 18,391.59 is: 25,378.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.47 : 43,908.29 = 18,391.59 : x
  2. Step 2: Convert to fraction form
    31,819.47/43,908.29 = 18,391.59/x
  3. Step 3: Cross multiply
    31,819.47x = 43,908.29 × 18,391.59
  4. Step 4: Simplify right side
    31,819.47x = 807,543,347.74
  5. Step 5: Solve for x
    x = 807,543,347.74/31,819.47
  6. Step 6: Final answer
    x = 25,378.91

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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.