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Finding the Fourth Proportional to 18,607.87, 27,902.98 and 7,215.12

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Solution

The fourth proportional to 18,607.87, 27,902.98 and 7,215.12 is: 10,819.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.87 : 27,902.98 = 7,215.12 : x
  2. Step 2: Convert to fraction form
    18,607.87/27,902.98 = 7,215.12/x
  3. Step 3: Cross multiply
    18,607.87x = 27,902.98 × 7,215.12
  4. Step 4: Simplify right side
    18,607.87x = 201,323,358.08
  5. Step 5: Solve for x
    x = 201,323,358.08/18,607.87
  6. Step 6: Final answer
    x = 10,819.26

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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.