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Finding the Fourth Proportional to 6,657.52, 9,120.79 and 6,408.28

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Solution

The fourth proportional to 6,657.52, 9,120.79 and 6,408.28 is: 8,779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,657.52 : 9,120.79 = 6,408.28 : x
  2. Step 2: Convert to fraction form
    6,657.52/9,120.79 = 6,408.28/x
  3. Step 3: Cross multiply
    6,657.52x = 9,120.79 × 6,408.28
  4. Step 4: Simplify right side
    6,657.52x = 58,448,576.14
  5. Step 5: Solve for x
    x = 58,448,576.14/6,657.52
  6. Step 6: Final answer
    x = 8,779.33

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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.