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Finding the Fourth Proportional to 8,661.30, 12,993.32 and 2,816.55

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Solution

The fourth proportional to 8,661.30, 12,993.32 and 2,816.55 is: 4,225.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.30 : 12,993.32 = 2,816.55 : x
  2. Step 2: Convert to fraction form
    8,661.30/12,993.32 = 2,816.55/x
  3. Step 3: Cross multiply
    8,661.30x = 12,993.32 × 2,816.55
  4. Step 4: Simplify right side
    8,661.30x = 36,596,321.36
  5. Step 5: Solve for x
    x = 36,596,321.36/8,661.30
  6. Step 6: Final answer
    x = 4,225.27

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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.