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Finding the Fourth Proportional to 8,759.13, 13,120.38 and 8,509.92

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Solution

The fourth proportional to 8,759.13, 13,120.38 and 8,509.92 is: 12,747.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.13 : 13,120.38 = 8,509.92 : x
  2. Step 2: Convert to fraction form
    8,759.13/13,120.38 = 8,509.92/x
  3. Step 3: Cross multiply
    8,759.13x = 13,120.38 × 8,509.92
  4. Step 4: Simplify right side
    8,759.13x = 111,653,384.17
  5. Step 5: Solve for x
    x = 111,653,384.17/8,759.13
  6. Step 6: Final answer
    x = 12,747.09

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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.