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Finding the Fourth Proportional to 8,782.20, 13,205.70 and 7,356.60

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Solution

The fourth proportional to 8,782.20, 13,205.70 and 7,356.60 is: 11,062.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.20 : 13,205.70 = 7,356.60 : x
  2. Step 2: Convert to fraction form
    8,782.20/13,205.70 = 7,356.60/x
  3. Step 3: Cross multiply
    8,782.20x = 13,205.70 × 7,356.60
  4. Step 4: Simplify right side
    8,782.20x = 97,149,052.62
  5. Step 5: Solve for x
    x = 97,149,052.62/8,782.20
  6. Step 6: Final answer
    x = 11,062.04

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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.