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Finding the Fourth Proportional to 12,424.68, 18,612.18 and 7,479.36

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Solution

The fourth proportional to 12,424.68, 18,612.18 and 7,479.36 is: 11,204.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,424.68 : 18,612.18 = 7,479.36 : x
  2. Step 2: Convert to fraction form
    12,424.68/18,612.18 = 7,479.36/x
  3. Step 3: Cross multiply
    12,424.68x = 18,612.18 × 7,479.36
  4. Step 4: Simplify right side
    12,424.68x = 139,207,194.60
  5. Step 5: Solve for x
    x = 139,207,194.60/12,424.68
  6. Step 6: Final answer
    x = 11,204.09

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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.