Home / 31,235.96-43,119.70-19,920.64

Finding the Fourth Proportional to 31,235.96, 43,119.70 and 19,920.64

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Solution

The fourth proportional to 31,235.96, 43,119.70 and 19,920.64 is: 27,499.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,235.96 : 43,119.70 = 19,920.64 : x
  2. Step 2: Convert to fraction form
    31,235.96/43,119.70 = 19,920.64/x
  3. Step 3: Cross multiply
    31,235.96x = 43,119.70 × 19,920.64
  4. Step 4: Simplify right side
    31,235.96x = 858,972,020.61
  5. Step 5: Solve for x
    x = 858,972,020.61/31,235.96
  6. Step 6: Final answer
    x = 27,499.46

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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.