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Finding the Fourth Proportional to 7,315.60, 10,957.20 and 6,494.80

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Solution

The fourth proportional to 7,315.60, 10,957.20 and 6,494.80 is: 9,727.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,315.60 : 10,957.20 = 6,494.80 : x
  2. Step 2: Convert to fraction form
    7,315.60/10,957.20 = 6,494.80/x
  3. Step 3: Cross multiply
    7,315.60x = 10,957.20 × 6,494.80
  4. Step 4: Simplify right side
    7,315.60x = 71,164,822.56
  5. Step 5: Solve for x
    x = 71,164,822.56/7,315.60
  6. Step 6: Final answer
    x = 9,727.82

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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.