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Finding the Fourth Proportional to 6,658.32, 9,121.80 and 6,409.05

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Solution

The fourth proportional to 6,658.32, 9,121.80 and 6,409.05 is: 8,780.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,658.32 : 9,121.80 = 6,409.05 : x
  2. Step 2: Convert to fraction form
    6,658.32/9,121.80 = 6,409.05/x
  3. Step 3: Cross multiply
    6,658.32x = 9,121.80 × 6,409.05
  4. Step 4: Simplify right side
    6,658.32x = 58,462,072.29
  5. Step 5: Solve for x
    x = 58,462,072.29/6,658.32
  6. Step 6: Final answer
    x = 8,780.30

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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.