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Finding the Fourth Proportional to 6,657.32, 9,120.43 and 6,408.05

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Solution

The fourth proportional to 6,657.32, 9,120.43 and 6,408.05 is: 8,778.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,657.32 : 9,120.43 = 6,408.05 : x
  2. Step 2: Convert to fraction form
    6,657.32/9,120.43 = 6,408.05/x
  3. Step 3: Cross multiply
    6,657.32x = 9,120.43 × 6,408.05
  4. Step 4: Simplify right side
    6,657.32x = 58,444,133.87
  5. Step 5: Solve for x
    x = 58,444,133.87/6,657.32
  6. Step 6: Final answer
    x = 8,778.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.