Home / 31,140.20-42,974.10-16,993.64

Finding the Fourth Proportional to 31,140.20, 42,974.10 and 16,993.64

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Solution

The fourth proportional to 31,140.20, 42,974.10 and 16,993.64 is: 23,451.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,140.20 : 42,974.10 = 16,993.64 : x
  2. Step 2: Convert to fraction form
    31,140.20/42,974.10 = 16,993.64/x
  3. Step 3: Cross multiply
    31,140.20x = 42,974.10 × 16,993.64
  4. Step 4: Simplify right side
    31,140.20x = 730,286,384.72
  5. Step 5: Solve for x
    x = 730,286,384.72/31,140.20
  6. Step 6: Final answer
    x = 23,451.56

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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.