Home / 31,689.46-43,728.50-18,940.14

Finding the Fourth Proportional to 31,689.46, 43,728.50 and 18,940.14

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Solution

The fourth proportional to 31,689.46, 43,728.50 and 18,940.14 is: 26,135.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,689.46 : 43,728.50 = 18,940.14 : x
  2. Step 2: Convert to fraction form
    31,689.46/43,728.50 = 18,940.14/x
  3. Step 3: Cross multiply
    31,689.46x = 43,728.50 × 18,940.14
  4. Step 4: Simplify right side
    31,689.46x = 828,223,911.99
  5. Step 5: Solve for x
    x = 828,223,911.99/31,689.46
  6. Step 6: Final answer
    x = 26,135.63

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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.