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Finding the Fourth Proportional to 7,257.60, 10,860.80 and 6,643.20

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Solution

The fourth proportional to 7,257.60, 10,860.80 and 6,643.20 is: 9,941.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,257.60 : 10,860.80 = 6,643.20 : x
  2. Step 2: Convert to fraction form
    7,257.60/10,860.80 = 6,643.20/x
  3. Step 3: Cross multiply
    7,257.60x = 10,860.80 × 6,643.20
  4. Step 4: Simplify right side
    7,257.60x = 72,150,466.56
  5. Step 5: Solve for x
    x = 72,150,466.56/7,257.60
  6. Step 6: Final answer
    x = 9,941.37

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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.