Home / 31,167.87-43,058.70-20,438.34

Finding the Fourth Proportional to 31,167.87, 43,058.70 and 20,438.34

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Solution

The fourth proportional to 31,167.87, 43,058.70 and 20,438.34 is: 28,235.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,167.87 : 43,058.70 = 20,438.34 : x
  2. Step 2: Convert to fraction form
    31,167.87/43,058.70 = 20,438.34/x
  3. Step 3: Cross multiply
    31,167.87x = 43,058.70 × 20,438.34
  4. Step 4: Simplify right side
    31,167.87x = 880,048,350.56
  5. Step 5: Solve for x
    x = 880,048,350.56/31,167.87
  6. Step 6: Final answer
    x = 28,235.76

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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.