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Finding the Fourth Proportional to 18,362.72, 27,543.44 and 5,215.05

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Solution

The fourth proportional to 18,362.72, 27,543.44 and 5,215.05 is: 7,822.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.72 : 27,543.44 = 5,215.05 : x
  2. Step 2: Convert to fraction form
    18,362.72/27,543.44 = 5,215.05/x
  3. Step 3: Cross multiply
    18,362.72x = 27,543.44 × 5,215.05
  4. Step 4: Simplify right side
    18,362.72x = 143,640,390.70
  5. Step 5: Solve for x
    x = 143,640,390.70/18,362.72
  6. Step 6: Final answer
    x = 7,822.39

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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.