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Finding the Fourth Proportional to 18,819.88, 28,176.06 and 12,652.84

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Solution

The fourth proportional to 18,819.88, 28,176.06 and 12,652.84 is: 18,943.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.88 : 28,176.06 = 12,652.84 : x
  2. Step 2: Convert to fraction form
    18,819.88/28,176.06 = 12,652.84/x
  3. Step 3: Cross multiply
    18,819.88x = 28,176.06 × 12,652.84
  4. Step 4: Simplify right side
    18,819.88x = 356,507,179.01
  5. Step 5: Solve for x
    x = 356,507,179.01/18,819.88
  6. Step 6: Final answer
    x = 18,943.12

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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.