Home / 31,818.62-43,907.13-18,390.75

Finding the Fourth Proportional to 31,818.62, 43,907.13 and 18,390.75

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Solution

The fourth proportional to 31,818.62, 43,907.13 and 18,390.75 is: 25,377.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,818.62 : 43,907.13 = 18,390.75 : x
  2. Step 2: Convert to fraction form
    31,818.62/43,907.13 = 18,390.75/x
  3. Step 3: Cross multiply
    31,818.62x = 43,907.13 × 18,390.75
  4. Step 4: Simplify right side
    31,818.62x = 807,484,886.40
  5. Step 5: Solve for x
    x = 807,484,886.40/31,818.62
  6. Step 6: Final answer
    x = 25,377.74

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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.