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Finding the Fourth Proportional to 15,229.99, 21,008.94 and 8,855.87

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Solution

The fourth proportional to 15,229.99, 21,008.94 and 8,855.87 is: 12,216.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.99 : 21,008.94 = 8,855.87 : x
  2. Step 2: Convert to fraction form
    15,229.99/21,008.94 = 8,855.87/x
  3. Step 3: Cross multiply
    15,229.99x = 21,008.94 × 8,855.87
  4. Step 4: Simplify right side
    15,229.99x = 186,052,494.00
  5. Step 5: Solve for x
    x = 186,052,494.00/15,229.99
  6. Step 6: Final answer
    x = 12,216.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.