Home / 31,280.99-43,161.05-18,538.17

Finding the Fourth Proportional to 31,280.99, 43,161.05 and 18,538.17

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Solution

The fourth proportional to 31,280.99, 43,161.05 and 18,538.17 is: 25,578.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,280.99 : 43,161.05 = 18,538.17 : x
  2. Step 2: Convert to fraction form
    31,280.99/43,161.05 = 18,538.17/x
  3. Step 3: Cross multiply
    31,280.99x = 43,161.05 × 18,538.17
  4. Step 4: Simplify right side
    31,280.99x = 800,126,766.77
  5. Step 5: Solve for x
    x = 800,126,766.77/31,280.99
  6. Step 6: Final answer
    x = 25,578.69

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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.