Home / 31,531.32-43,531.02-20,935.44

Finding the Fourth Proportional to 31,531.32, 43,531.02 and 20,935.44

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Solution

The fourth proportional to 31,531.32, 43,531.02 and 20,935.44 is: 28,902.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,531.32 : 43,531.02 = 20,935.44 : x
  2. Step 2: Convert to fraction form
    31,531.32/43,531.02 = 20,935.44/x
  3. Step 3: Cross multiply
    31,531.32x = 43,531.02 × 20,935.44
  4. Step 4: Simplify right side
    31,531.32x = 911,341,057.35
  5. Step 5: Solve for x
    x = 911,341,057.35/31,531.32
  6. Step 6: Final answer
    x = 28,902.72

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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.