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Finding the Fourth Proportional to 18,209.61, 27,310.57 and 9,315.41

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Solution

The fourth proportional to 18,209.61, 27,310.57 and 9,315.41 is: 13,971.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,209.61 : 27,310.57 = 9,315.41 : x
  2. Step 2: Convert to fraction form
    18,209.61/27,310.57 = 9,315.41/x
  3. Step 3: Cross multiply
    18,209.61x = 27,310.57 × 9,315.41
  4. Step 4: Simplify right side
    18,209.61x = 254,408,997.04
  5. Step 5: Solve for x
    x = 254,408,997.04/18,209.61
  6. Step 6: Final answer
    x = 13,971.14

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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.