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Finding the Fourth Proportional to 18,411.22, 27,620.43 and 7,315.84

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Solution

The fourth proportional to 18,411.22, 27,620.43 and 7,315.84 is: 10,975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.22 : 27,620.43 = 7,315.84 : x
  2. Step 2: Convert to fraction form
    18,411.22/27,620.43 = 7,315.84/x
  3. Step 3: Cross multiply
    18,411.22x = 27,620.43 × 7,315.84
  4. Step 4: Simplify right side
    18,411.22x = 202,066,646.61
  5. Step 5: Solve for x
    x = 202,066,646.61/18,411.22
  6. Step 6: Final answer
    x = 10,975.19

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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.