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Finding the Fourth Proportional to 11,428.58, 15,762.97 and 8,067.89

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Solution

The fourth proportional to 11,428.58, 15,762.97 and 8,067.89 is: 11,127.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.58 : 15,762.97 = 8,067.89 : x
  2. Step 2: Convert to fraction form
    11,428.58/15,762.97 = 8,067.89/x
  3. Step 3: Cross multiply
    11,428.58x = 15,762.97 × 8,067.89
  4. Step 4: Simplify right side
    11,428.58x = 127,173,908.03
  5. Step 5: Solve for x
    x = 127,173,908.03/11,428.58
  6. Step 6: Final answer
    x = 11,127.71

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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.