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Finding the Fourth Proportional to 8,782.12, 13,152.48 and 7,621.59

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Solution

The fourth proportional to 8,782.12, 13,152.48 and 7,621.59 is: 11,414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.12 : 13,152.48 = 7,621.59 : x
  2. Step 2: Convert to fraction form
    8,782.12/13,152.48 = 7,621.59/x
  3. Step 3: Cross multiply
    8,782.12x = 13,152.48 × 7,621.59
  4. Step 4: Simplify right side
    8,782.12x = 100,242,830.78
  5. Step 5: Solve for x
    x = 100,242,830.78/8,782.12
  6. Step 6: Final answer
    x = 11,414.42

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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.