Home / 31,686.05-43,723.78-18,936.70

Finding the Fourth Proportional to 31,686.05, 43,723.78 and 18,936.70

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Solution

The fourth proportional to 31,686.05, 43,723.78 and 18,936.70 is: 26,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.05 : 43,723.78 = 18,936.70 : x
  2. Step 2: Convert to fraction form
    31,686.05/43,723.78 = 18,936.70/x
  3. Step 3: Cross multiply
    31,686.05x = 43,723.78 × 18,936.70
  4. Step 4: Simplify right side
    31,686.05x = 827,983,948.07
  5. Step 5: Solve for x
    x = 827,983,948.07/31,686.05
  6. Step 6: Final answer
    x = 26,130.86

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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.