Home / 31,531.94-43,531.90-20,936.06

Finding the Fourth Proportional to 31,531.94, 43,531.90 and 20,936.06

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Solution

The fourth proportional to 31,531.94, 43,531.90 and 20,936.06 is: 28,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,531.94 : 43,531.90 = 20,936.06 : x
  2. Step 2: Convert to fraction form
    31,531.94/43,531.90 = 20,936.06/x
  3. Step 3: Cross multiply
    31,531.94x = 43,531.90 × 20,936.06
  4. Step 4: Simplify right side
    31,531.94x = 911,386,470.31
  5. Step 5: Solve for x
    x = 911,386,470.31/31,531.94
  6. Step 6: Final answer
    x = 28,903.60

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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.