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Finding the Fourth Proportional to 18,263.79, 27,408 and 7,169.18

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Solution

The fourth proportional to 18,263.79, 27,408 and 7,169.18 is: 10,758.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,263.79 : 27,408 = 7,169.18 : x
  2. Step 2: Convert to fraction form
    18,263.79/27,408 = 7,169.18/x
  3. Step 3: Cross multiply
    18,263.79x = 27,408 × 7,169.18
  4. Step 4: Simplify right side
    18,263.79x = 196,492,748.40
  5. Step 5: Solve for x
    x = 196,492,748.40/18,263.79
  6. Step 6: Final answer
    x = 10,758.60

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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.