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Finding the Fourth Proportional to 8,778.05, 12,115.08 and 5,377.08

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Solution

The fourth proportional to 8,778.05, 12,115.08 and 5,377.08 is: 7,421.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.05 : 12,115.08 = 5,377.08 : x
  2. Step 2: Convert to fraction form
    8,778.05/12,115.08 = 5,377.08/x
  3. Step 3: Cross multiply
    8,778.05x = 12,115.08 × 5,377.08
  4. Step 4: Simplify right side
    8,778.05x = 65,143,754.37
  5. Step 5: Solve for x
    x = 65,143,754.37/8,778.05
  6. Step 6: Final answer
    x = 7,421.21

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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.