Home / 21,190.55-31,791.56-6,399.95

Finding the Fourth Proportional to 21,190.55, 31,791.56 and 6,399.95

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Solution

The fourth proportional to 21,190.55, 31,791.56 and 6,399.95 is: 9,601.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.55 : 31,791.56 = 6,399.95 : x
  2. Step 2: Convert to fraction form
    21,190.55/31,791.56 = 6,399.95/x
  3. Step 3: Cross multiply
    21,190.55x = 31,791.56 × 6,399.95
  4. Step 4: Simplify right side
    21,190.55x = 203,464,203.46
  5. Step 5: Solve for x
    x = 203,464,203.46/21,190.55
  6. Step 6: Final answer
    x = 9,601.65

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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.