Home / 31,115.55-42,878.07-22,137.90

Finding the Fourth Proportional to 31,115.55, 42,878.07 and 22,137.90

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Solution

The fourth proportional to 31,115.55, 42,878.07 and 22,137.90 is: 30,506.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.55 : 42,878.07 = 22,137.90 : x
  2. Step 2: Convert to fraction form
    31,115.55/42,878.07 = 22,137.90/x
  3. Step 3: Cross multiply
    31,115.55x = 42,878.07 × 22,137.90
  4. Step 4: Simplify right side
    31,115.55x = 949,230,425.85
  5. Step 5: Solve for x
    x = 949,230,425.85/31,115.55
  6. Step 6: Final answer
    x = 30,506.63

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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.