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Finding the Fourth Proportional to 18,691.56, 28,020.06 and 6,995.88

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Solution

The fourth proportional to 18,691.56, 28,020.06 and 6,995.88 is: 10,487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.56 : 28,020.06 = 6,995.88 : x
  2. Step 2: Convert to fraction form
    18,691.56/28,020.06 = 6,995.88/x
  3. Step 3: Cross multiply
    18,691.56x = 28,020.06 × 6,995.88
  4. Step 4: Simplify right side
    18,691.56x = 196,024,977.35
  5. Step 5: Solve for x
    x = 196,024,977.35/18,691.56
  6. Step 6: Final answer
    x = 10,487.35

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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.