Home / 31,819.63-43,908.51-18,391.75

Finding the Fourth Proportional to 31,819.63, 43,908.51 and 18,391.75

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Solution

The fourth proportional to 31,819.63, 43,908.51 and 18,391.75 is: 25,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.63 : 43,908.51 = 18,391.75 : x
  2. Step 2: Convert to fraction form
    31,819.63/43,908.51 = 18,391.75/x
  3. Step 3: Cross multiply
    31,819.63x = 43,908.51 × 18,391.75
  4. Step 4: Simplify right side
    31,819.63x = 807,554,119.25
  5. Step 5: Solve for x
    x = 807,554,119.25/31,819.63
  6. Step 6: Final answer
    x = 25,379.12

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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.