Home / 31,285.81-43,175.49-17,138.65

Finding the Fourth Proportional to 31,285.81, 43,175.49 and 17,138.65

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Solution

The fourth proportional to 31,285.81, 43,175.49 and 17,138.65 is: 23,651.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,285.81 : 43,175.49 = 17,138.65 : x
  2. Step 2: Convert to fraction form
    31,285.81/43,175.49 = 17,138.65/x
  3. Step 3: Cross multiply
    31,285.81x = 43,175.49 × 17,138.65
  4. Step 4: Simplify right side
    31,285.81x = 739,969,503.75
  5. Step 5: Solve for x
    x = 739,969,503.75/31,285.81
  6. Step 6: Final answer
    x = 23,651.92

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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.