Home / 31,687.05-43,725.16-18,937.70

Finding the Fourth Proportional to 31,687.05, 43,725.16 and 18,937.70

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Solution

The fourth proportional to 31,687.05, 43,725.16 and 18,937.70 is: 26,132.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,687.05 : 43,725.16 = 18,937.70 : x
  2. Step 2: Convert to fraction form
    31,687.05/43,725.16 = 18,937.70/x
  3. Step 3: Cross multiply
    31,687.05x = 43,725.16 × 18,937.70
  4. Step 4: Simplify right side
    31,687.05x = 828,053,962.53
  5. Step 5: Solve for x
    x = 828,053,962.53/31,687.05
  6. Step 6: Final answer
    x = 26,132.25

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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.