Home / 31,315.68-43,229.20-18,738.08

Finding the Fourth Proportional to 31,315.68, 43,229.20 and 18,738.08

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Solution

The fourth proportional to 31,315.68, 43,229.20 and 18,738.08 is: 25,866.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,315.68 : 43,229.20 = 18,738.08 : x
  2. Step 2: Convert to fraction form
    31,315.68/43,229.20 = 18,738.08/x
  3. Step 3: Cross multiply
    31,315.68x = 43,229.20 × 18,738.08
  4. Step 4: Simplify right side
    31,315.68x = 810,032,207.94
  5. Step 5: Solve for x
    x = 810,032,207.94/31,315.68
  6. Step 6: Final answer
    x = 25,866.67

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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.