Home / 31,435.17-43,378.33-18,687.69

Finding the Fourth Proportional to 31,435.17, 43,378.33 and 18,687.69

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Solution

The fourth proportional to 31,435.17, 43,378.33 and 18,687.69 is: 25,787.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,435.17 : 43,378.33 = 18,687.69 : x
  2. Step 2: Convert to fraction form
    31,435.17/43,378.33 = 18,687.69/x
  3. Step 3: Cross multiply
    31,435.17x = 43,378.33 × 18,687.69
  4. Step 4: Simplify right side
    31,435.17x = 810,640,783.76
  5. Step 5: Solve for x
    x = 810,640,783.76/31,435.17
  6. Step 6: Final answer
    x = 25,787.70

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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.