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Finding the Fourth Proportional to 18,850.95, 28,265.65 and 7,748.50

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Solution

The fourth proportional to 18,850.95, 28,265.65 and 7,748.50 is: 11,618.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,850.95 : 28,265.65 = 7,748.50 : x
  2. Step 2: Convert to fraction form
    18,850.95/28,265.65 = 7,748.50/x
  3. Step 3: Cross multiply
    18,850.95x = 28,265.65 × 7,748.50
  4. Step 4: Simplify right side
    18,850.95x = 219,016,389.03
  5. Step 5: Solve for x
    x = 219,016,389.03/18,850.95
  6. Step 6: Final answer
    x = 11,618.32

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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.