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Finding the Fourth Proportional to 8,762.80, 13,147.80 and 3,218.80

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Solution

The fourth proportional to 8,762.80, 13,147.80 and 3,218.80 is: 4,829.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.80 : 13,147.80 = 3,218.80 : x
  2. Step 2: Convert to fraction form
    8,762.80/13,147.80 = 3,218.80/x
  3. Step 3: Cross multiply
    8,762.80x = 13,147.80 × 3,218.80
  4. Step 4: Simplify right side
    8,762.80x = 42,320,138.64
  5. Step 5: Solve for x
    x = 42,320,138.64/8,762.80
  6. Step 6: Final answer
    x = 4,829.52

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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.