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Finding the Fourth Proportional to 19,361.84, 28,988.01 and 12,324.42

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Solution

The fourth proportional to 19,361.84, 28,988.01 and 12,324.42 is: 18,451.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.84 : 28,988.01 = 12,324.42 : x
  2. Step 2: Convert to fraction form
    19,361.84/28,988.01 = 12,324.42/x
  3. Step 3: Cross multiply
    19,361.84x = 28,988.01 × 12,324.42
  4. Step 4: Simplify right side
    19,361.84x = 357,260,410.20
  5. Step 5: Solve for x
    x = 357,260,410.20/19,361.84
  6. Step 6: Final answer
    x = 18,451.78

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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.