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Finding the Fourth Proportional to 8,785.30, 13,163.55 and 7,489.30

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Solution

The fourth proportional to 8,785.30, 13,163.55 and 7,489.30 is: 11,221.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.30 : 13,163.55 = 7,489.30 : x
  2. Step 2: Convert to fraction form
    8,785.30/13,163.55 = 7,489.30/x
  3. Step 3: Cross multiply
    8,785.30x = 13,163.55 × 7,489.30
  4. Step 4: Simplify right side
    8,785.30x = 98,585,775.02
  5. Step 5: Solve for x
    x = 98,585,775.02/8,785.30
  6. Step 6: Final answer
    x = 11,221.67

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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.