Home / 31,378.33-43,278.10-21,314.53

Finding the Fourth Proportional to 31,378.33, 43,278.10 and 21,314.53

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Solution

The fourth proportional to 31,378.33, 43,278.10 and 21,314.53 is: 29,397.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.33 : 43,278.10 = 21,314.53 : x
  2. Step 2: Convert to fraction form
    31,378.33/43,278.10 = 21,314.53/x
  3. Step 3: Cross multiply
    31,378.33x = 43,278.10 × 21,314.53
  4. Step 4: Simplify right side
    31,378.33x = 922,452,360.79
  5. Step 5: Solve for x
    x = 922,452,360.79/31,378.33
  6. Step 6: Final answer
    x = 29,397.75

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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.