Home / 20,930.16-31,407.48-7,791.84

Finding the Fourth Proportional to 20,930.16, 31,407.48 and 7,791.84

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Solution

The fourth proportional to 20,930.16, 31,407.48 and 7,791.84 is: 11,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.16 : 31,407.48 = 7,791.84 : x
  2. Step 2: Convert to fraction form
    20,930.16/31,407.48 = 7,791.84/x
  3. Step 3: Cross multiply
    20,930.16x = 31,407.48 × 7,791.84
  4. Step 4: Simplify right side
    20,930.16x = 244,722,058.96
  5. Step 5: Solve for x
    x = 244,722,058.96/20,930.16
  6. Step 6: Final answer
    x = 11,692.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.