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Finding the Fourth Proportional to 6,511.20, 9,766.80 and 6,424.80

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Solution

The fourth proportional to 6,511.20, 9,766.80 and 6,424.80 is: 9,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.20 : 9,766.80 = 6,424.80 : x
  2. Step 2: Convert to fraction form
    6,511.20/9,766.80 = 6,424.80/x
  3. Step 3: Cross multiply
    6,511.20x = 9,766.80 × 6,424.80
  4. Step 4: Simplify right side
    6,511.20x = 62,749,736.64
  5. Step 5: Solve for x
    x = 62,749,736.64/6,511.20
  6. Step 6: Final answer
    x = 9,637.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.