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Finding the Fourth Proportional to 8,789.58, 12,135.28 and 7,843.75

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Solution

The fourth proportional to 8,789.58, 12,135.28 and 7,843.75 is: 10,829.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.58 : 12,135.28 = 7,843.75 : x
  2. Step 2: Convert to fraction form
    8,789.58/12,135.28 = 7,843.75/x
  3. Step 3: Cross multiply
    8,789.58x = 12,135.28 × 7,843.75
  4. Step 4: Simplify right side
    8,789.58x = 95,186,041.82
  5. Step 5: Solve for x
    x = 95,186,041.82/8,789.58
  6. Step 6: Final answer
    x = 10,829.42

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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.