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Finding the Fourth Proportional to 18,313.20, 27,464.40 and 7,216.20

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Solution

The fourth proportional to 18,313.20, 27,464.40 and 7,216.20 is: 10,822.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,313.20 : 27,464.40 = 7,216.20 : x
  2. Step 2: Convert to fraction form
    18,313.20/27,464.40 = 7,216.20/x
  3. Step 3: Cross multiply
    18,313.20x = 27,464.40 × 7,216.20
  4. Step 4: Simplify right side
    18,313.20x = 198,188,603.28
  5. Step 5: Solve for x
    x = 198,188,603.28/18,313.20
  6. Step 6: Final answer
    x = 10,822.17

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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.