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Finding the Fourth Proportional to 8,751.12, 12,069.72 and 5,607.60

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Solution

The fourth proportional to 8,751.12, 12,069.72 and 5,607.60 is: 7,734.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.12 : 12,069.72 = 5,607.60 : x
  2. Step 2: Convert to fraction form
    8,751.12/12,069.72 = 5,607.60/x
  3. Step 3: Cross multiply
    8,751.12x = 12,069.72 × 5,607.60
  4. Step 4: Simplify right side
    8,751.12x = 67,682,161.87
  5. Step 5: Solve for x
    x = 67,682,161.87/8,751.12
  6. Step 6: Final answer
    x = 7,734.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.