Home / 31,435.78-43,380.17-17,287.78

Finding the Fourth Proportional to 31,435.78, 43,380.17 and 17,287.78

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Solution

The fourth proportional to 31,435.78, 43,380.17 and 17,287.78 is: 23,856.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,435.78 : 43,380.17 = 17,287.78 : x
  2. Step 2: Convert to fraction form
    31,435.78/43,380.17 = 17,287.78/x
  3. Step 3: Cross multiply
    31,435.78x = 43,380.17 × 17,287.78
  4. Step 4: Simplify right side
    31,435.78x = 749,946,835.32
  5. Step 5: Solve for x
    x = 749,946,835.32/31,435.78
  6. Step 6: Final answer
    x = 23,856.47

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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.