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Finding the Fourth Proportional to 12,480.88, 18,727.44 and 7,799.68

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Solution

The fourth proportional to 12,480.88, 18,727.44 and 7,799.68 is: 11,703.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.88 : 18,727.44 = 7,799.68 : x
  2. Step 2: Convert to fraction form
    12,480.88/18,727.44 = 7,799.68/x
  3. Step 3: Cross multiply
    12,480.88x = 18,727.44 × 7,799.68
  4. Step 4: Simplify right side
    12,480.88x = 146,068,039.22
  5. Step 5: Solve for x
    x = 146,068,039.22/12,480.88
  6. Step 6: Final answer
    x = 11,703.34

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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.