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Finding the Fourth Proportional to 31,593.71, 43,579.41 and 20,251.51

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Solution

The fourth proportional to 31,593.71, 43,579.41 and 20,251.51 is: 27,934.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,593.71 : 43,579.41 = 20,251.51 : x
  2. Step 2: Convert to fraction form
    31,593.71/43,579.41 = 20,251.51/x
  3. Step 3: Cross multiply
    31,593.71x = 43,579.41 × 20,251.51
  4. Step 4: Simplify right side
    31,593.71x = 882,548,857.41
  5. Step 5: Solve for x
    x = 882,548,857.41/31,593.71
  6. Step 6: Final answer
    x = 27,934.32

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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.