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Finding the Fourth Proportional to 6,622.80, 9,148.79 and 6,272.88

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Solution

The fourth proportional to 6,622.80, 9,148.79 and 6,272.88 is: 8,665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.80 : 9,148.79 = 6,272.88 : x
  2. Step 2: Convert to fraction form
    6,622.80/9,148.79 = 6,272.88/x
  3. Step 3: Cross multiply
    6,622.80x = 9,148.79 × 6,272.88
  4. Step 4: Simplify right side
    6,622.80x = 57,389,277.50
  5. Step 5: Solve for x
    x = 57,389,277.50/6,622.80
  6. Step 6: Final answer
    x = 8,665.41

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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.