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Finding the Fourth Proportional to 18,647.99, 27,967.71 and 5,320.73

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Solution

The fourth proportional to 18,647.99, 27,967.71 and 5,320.73 is: 7,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,647.99 : 27,967.71 = 5,320.73 : x
  2. Step 2: Convert to fraction form
    18,647.99/27,967.71 = 5,320.73/x
  3. Step 3: Cross multiply
    18,647.99x = 27,967.71 × 5,320.73
  4. Step 4: Simplify right side
    18,647.99x = 148,808,633.63
  5. Step 5: Solve for x
    x = 148,808,633.63/18,647.99
  6. Step 6: Final answer
    x = 7,979.88

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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.