Home / 31,018.04-42,805.17-18,440.36

Finding the Fourth Proportional to 31,018.04, 42,805.17 and 18,440.36

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Solution

The fourth proportional to 31,018.04, 42,805.17 and 18,440.36 is: 25,447.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,018.04 : 42,805.17 = 18,440.36 : x
  2. Step 2: Convert to fraction form
    31,018.04/42,805.17 = 18,440.36/x
  3. Step 3: Cross multiply
    31,018.04x = 42,805.17 × 18,440.36
  4. Step 4: Simplify right side
    31,018.04x = 789,342,744.66
  5. Step 5: Solve for x
    x = 789,342,744.66/31,018.04
  6. Step 6: Final answer
    x = 25,447.86

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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.