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Finding the Fourth Proportional to 7,763.60, 11,629.20 and 5,813.12

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Solution

The fourth proportional to 7,763.60, 11,629.20 and 5,813.12 is: 8,707.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,763.60 : 11,629.20 = 5,813.12 : x
  2. Step 2: Convert to fraction form
    7,763.60/11,629.20 = 5,813.12/x
  3. Step 3: Cross multiply
    7,763.60x = 11,629.20 × 5,813.12
  4. Step 4: Simplify right side
    7,763.60x = 67,601,935.10
  5. Step 5: Solve for x
    x = 67,601,935.10/7,763.60
  6. Step 6: Final answer
    x = 8,707.55

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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.