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Finding the Fourth Proportional to 22,388.68, 30,900.80 and 12,834.99

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Solution

The fourth proportional to 22,388.68, 30,900.80 and 12,834.99 is: 17,714.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,388.68 : 30,900.80 = 12,834.99 : x
  2. Step 2: Convert to fraction form
    22,388.68/30,900.80 = 12,834.99/x
  3. Step 3: Cross multiply
    22,388.68x = 30,900.80 × 12,834.99
  4. Step 4: Simplify right side
    22,388.68x = 396,611,343.11
  5. Step 5: Solve for x
    x = 396,611,343.11/22,388.68
  6. Step 6: Final answer
    x = 17,714.81

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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.