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Finding the Fourth Proportional to 12,479.28, 17,223.08 and 12,069.02

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Solution

The fourth proportional to 12,479.28, 17,223.08 and 12,069.02 is: 16,656.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.28 : 17,223.08 = 12,069.02 : x
  2. Step 2: Convert to fraction form
    12,479.28/17,223.08 = 12,069.02/x
  3. Step 3: Cross multiply
    12,479.28x = 17,223.08 × 12,069.02
  4. Step 4: Simplify right side
    12,479.28x = 207,865,550.52
  5. Step 5: Solve for x
    x = 207,865,550.52/12,479.28
  6. Step 6: Final answer
    x = 16,656.85

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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.