Home / 31,690.21-43,719.68-18,254.29

Finding the Fourth Proportional to 31,690.21, 43,719.68 and 18,254.29

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Solution

The fourth proportional to 31,690.21, 43,719.68 and 18,254.29 is: 25,183.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.21 : 43,719.68 = 18,254.29 : x
  2. Step 2: Convert to fraction form
    31,690.21/43,719.68 = 18,254.29/x
  3. Step 3: Cross multiply
    31,690.21x = 43,719.68 × 18,254.29
  4. Step 4: Simplify right side
    31,690.21x = 798,071,717.43
  5. Step 5: Solve for x
    x = 798,071,717.43/31,690.21
  6. Step 6: Final answer
    x = 25,183.54

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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.