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Finding the Fourth Proportional to 7,922.60, 11,859.60 and 7,485.20

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Solution

The fourth proportional to 7,922.60, 11,859.60 and 7,485.20 is: 11,204.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,922.60 : 11,859.60 = 7,485.20 : x
  2. Step 2: Convert to fraction form
    7,922.60/11,859.60 = 7,485.20/x
  3. Step 3: Cross multiply
    7,922.60x = 11,859.60 × 7,485.20
  4. Step 4: Simplify right side
    7,922.60x = 88,771,477.92
  5. Step 5: Solve for x
    x = 88,771,477.92/7,922.60
  6. Step 6: Final answer
    x = 11,204.84

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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.