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Finding the Fourth Proportional to 12,479.96, 18,736.32 and 9,724.28

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Solution

The fourth proportional to 12,479.96, 18,736.32 and 9,724.28 is: 14,599.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.96 : 18,736.32 = 9,724.28 : x
  2. Step 2: Convert to fraction form
    12,479.96/18,736.32 = 9,724.28/x
  3. Step 3: Cross multiply
    12,479.96x = 18,736.32 × 9,724.28
  4. Step 4: Simplify right side
    12,479.96x = 182,197,221.85
  5. Step 5: Solve for x
    x = 182,197,221.85/12,479.96
  6. Step 6: Final answer
    x = 14,599.18

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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.