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Finding the Fourth Proportional to 18,719.67, 28,071.30 and 7,024.70

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Solution

The fourth proportional to 18,719.67, 28,071.30 and 7,024.70 is: 10,533.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.67 : 28,071.30 = 7,024.70 : x
  2. Step 2: Convert to fraction form
    18,719.67/28,071.30 = 7,024.70/x
  3. Step 3: Cross multiply
    18,719.67x = 28,071.30 × 7,024.70
  4. Step 4: Simplify right side
    18,719.67x = 197,192,320.75
  5. Step 5: Solve for x
    x = 197,192,320.75/18,719.67
  6. Step 6: Final answer
    x = 10,533.96

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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.