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Finding the Fourth Proportional to 8,235.84, 11,357.84 and 7,288.12

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Solution

The fourth proportional to 8,235.84, 11,357.84 and 7,288.12 is: 10,050.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,235.84 : 11,357.84 = 7,288.12 : x
  2. Step 2: Convert to fraction form
    8,235.84/11,357.84 = 7,288.12/x
  3. Step 3: Cross multiply
    8,235.84x = 11,357.84 × 7,288.12
  4. Step 4: Simplify right side
    8,235.84x = 82,777,300.86
  5. Step 5: Solve for x
    x = 82,777,300.86/8,235.84
  6. Step 6: Final answer
    x = 10,050.86

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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.