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Finding the Fourth Proportional to 12,468.36, 17,205.66 and 6,879

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Solution

The fourth proportional to 12,468.36, 17,205.66 and 6,879 is: 9,492.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,468.36 : 17,205.66 = 6,879 : x
  2. Step 2: Convert to fraction form
    12,468.36/17,205.66 = 6,879/x
  3. Step 3: Cross multiply
    12,468.36x = 17,205.66 × 6,879
  4. Step 4: Simplify right side
    12,468.36x = 118,357,735.14
  5. Step 5: Solve for x
    x = 118,357,735.14/12,468.36
  6. Step 6: Final answer
    x = 9,492.65

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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.