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Finding the Fourth Proportional to 7,621.60, 11,497.60 and 7,232.80

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Solution

The fourth proportional to 7,621.60, 11,497.60 and 7,232.80 is: 10,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.60 : 11,497.60 = 7,232.80 : x
  2. Step 2: Convert to fraction form
    7,621.60/11,497.60 = 7,232.80/x
  3. Step 3: Cross multiply
    7,621.60x = 11,497.60 × 7,232.80
  4. Step 4: Simplify right side
    7,621.60x = 83,159,841.28
  5. Step 5: Solve for x
    x = 83,159,841.28/7,621.60
  6. Step 6: Final answer
    x = 10,911.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.