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Finding the Fourth Proportional to 18,007.20, 27,007.20 and 8,647.20

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Solution

The fourth proportional to 18,007.20, 27,007.20 and 8,647.20 is: 12,969.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,007.20 : 27,007.20 = 8,647.20 : x
  2. Step 2: Convert to fraction form
    18,007.20/27,007.20 = 8,647.20/x
  3. Step 3: Cross multiply
    18,007.20x = 27,007.20 × 8,647.20
  4. Step 4: Simplify right side
    18,007.20x = 233,536,659.84
  5. Step 5: Solve for x
    x = 233,536,659.84/18,007.20
  6. Step 6: Final answer
    x = 12,969.07

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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.