Home / 31,667.81-43,682.54-20,912.79

Finding the Fourth Proportional to 31,667.81, 43,682.54 and 20,912.79

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Solution

The fourth proportional to 31,667.81, 43,682.54 and 20,912.79 is: 28,847.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,667.81 : 43,682.54 = 20,912.79 : x
  2. Step 2: Convert to fraction form
    31,667.81/43,682.54 = 20,912.79/x
  3. Step 3: Cross multiply
    31,667.81x = 43,682.54 × 20,912.79
  4. Step 4: Simplify right side
    31,667.81x = 913,523,785.69
  5. Step 5: Solve for x
    x = 913,523,785.69/31,667.81
  6. Step 6: Final answer
    x = 28,847.08

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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.