Home / 31,675.11-43,692.60-20,920.08

Finding the Fourth Proportional to 31,675.11, 43,692.60 and 20,920.08

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Solution

The fourth proportional to 31,675.11, 43,692.60 and 20,920.08 is: 28,857.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,675.11 : 43,692.60 = 20,920.08 : x
  2. Step 2: Convert to fraction form
    31,675.11/43,692.60 = 20,920.08/x
  3. Step 3: Cross multiply
    31,675.11x = 43,692.60 × 20,920.08
  4. Step 4: Simplify right side
    31,675.11x = 914,052,687.41
  5. Step 5: Solve for x
    x = 914,052,687.41/31,675.11
  6. Step 6: Final answer
    x = 28,857.13

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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.