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Finding the Fourth Proportional to 8,965.20, 13,458.60 and 8,900.40

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Solution

The fourth proportional to 8,965.20, 13,458.60 and 8,900.40 is: 13,361.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,965.20 : 13,458.60 = 8,900.40 : x
  2. Step 2: Convert to fraction form
    8,965.20/13,458.60 = 8,900.40/x
  3. Step 3: Cross multiply
    8,965.20x = 13,458.60 × 8,900.40
  4. Step 4: Simplify right side
    8,965.20x = 119,786,923.44
  5. Step 5: Solve for x
    x = 119,786,923.44/8,965.20
  6. Step 6: Final answer
    x = 13,361.32

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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.