Home / 31,692.88-43,765.81-20,382.02

Finding the Fourth Proportional to 31,692.88, 43,765.81 and 20,382.02

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Solution

The fourth proportional to 31,692.88, 43,765.81 and 20,382.02 is: 28,146.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,692.88 : 43,765.81 = 20,382.02 : x
  2. Step 2: Convert to fraction form
    31,692.88/43,765.81 = 20,382.02/x
  3. Step 3: Cross multiply
    31,692.88x = 43,765.81 × 20,382.02
  4. Step 4: Simplify right side
    31,692.88x = 892,035,614.74
  5. Step 5: Solve for x
    x = 892,035,614.74/31,692.88
  6. Step 6: Final answer
    x = 28,146.25

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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.