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Finding the Fourth Proportional to 18,368.78, 27,537.80 and 8,515.14

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Solution

The fourth proportional to 18,368.78, 27,537.80 and 8,515.14 is: 12,765.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.78 : 27,537.80 = 8,515.14 : x
  2. Step 2: Convert to fraction form
    18,368.78/27,537.80 = 8,515.14/x
  3. Step 3: Cross multiply
    18,368.78x = 27,537.80 × 8,515.14
  4. Step 4: Simplify right side
    18,368.78x = 234,488,222.29
  5. Step 5: Solve for x
    x = 234,488,222.29/18,368.78
  6. Step 6: Final answer
    x = 12,765.58

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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.