Home / 31,647.72-43,692.80-19,727.20

Finding the Fourth Proportional to 31,647.72, 43,692.80 and 19,727.20

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Solution

The fourth proportional to 31,647.72, 43,692.80 and 19,727.20 is: 27,235.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,647.72 : 43,692.80 = 19,727.20 : x
  2. Step 2: Convert to fraction form
    31,647.72/43,692.80 = 19,727.20/x
  3. Step 3: Cross multiply
    31,647.72x = 43,692.80 × 19,727.20
  4. Step 4: Simplify right side
    31,647.72x = 861,936,604.16
  5. Step 5: Solve for x
    x = 861,936,604.16/31,647.72
  6. Step 6: Final answer
    x = 27,235.35

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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.