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Finding the Fourth Proportional to 22,390.12, 33,619.20 and 19,124.20

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Solution

The fourth proportional to 22,390.12, 33,619.20 and 19,124.20 is: 28,715.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,390.12 : 33,619.20 = 19,124.20 : x
  2. Step 2: Convert to fraction form
    22,390.12/33,619.20 = 19,124.20/x
  3. Step 3: Cross multiply
    22,390.12x = 33,619.20 × 19,124.20
  4. Step 4: Simplify right side
    22,390.12x = 642,940,304.64
  5. Step 5: Solve for x
    x = 642,940,304.64/22,390.12
  6. Step 6: Final answer
    x = 28,715.36

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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.