Home / 12,405.28-18,634.56-7,791.52

Finding the Fourth Proportional to 12,405.28, 18,634.56 and 7,791.52

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Solution

The fourth proportional to 12,405.28, 18,634.56 and 7,791.52 is: 11,704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.28 : 18,634.56 = 7,791.52 : x
  2. Step 2: Convert to fraction form
    12,405.28/18,634.56 = 7,791.52/x
  3. Step 3: Cross multiply
    12,405.28x = 18,634.56 × 7,791.52
  4. Step 4: Simplify right side
    12,405.28x = 145,191,546.93
  5. Step 5: Solve for x
    x = 145,191,546.93/12,405.28
  6. Step 6: Final answer
    x = 11,704.01

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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.