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Finding the Fourth Proportional to 22,200.94, 30,638.99 and 12,643.92

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Solution

The fourth proportional to 22,200.94, 30,638.99 and 12,643.92 is: 17,449.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,200.94 : 30,638.99 = 12,643.92 : x
  2. Step 2: Convert to fraction form
    22,200.94/30,638.99 = 12,643.92/x
  3. Step 3: Cross multiply
    22,200.94x = 30,638.99 × 12,643.92
  4. Step 4: Simplify right side
    22,200.94x = 387,396,875.22
  5. Step 5: Solve for x
    x = 387,396,875.22/22,200.94
  6. Step 6: Final answer
    x = 17,449.57

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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.