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Finding the Fourth Proportional to 18,754.89, 28,146.18 and 8,894.20

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Solution

The fourth proportional to 18,754.89, 28,146.18 and 8,894.20 is: 13,347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.89 : 28,146.18 = 8,894.20 : x
  2. Step 2: Convert to fraction form
    18,754.89/28,146.18 = 8,894.20/x
  3. Step 3: Cross multiply
    18,754.89x = 28,146.18 × 8,894.20
  4. Step 4: Simplify right side
    18,754.89x = 250,337,754.16
  5. Step 5: Solve for x
    x = 250,337,754.16/18,754.89
  6. Step 6: Final answer
    x = 13,347.87

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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.