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Finding the Fourth Proportional to 19,990.50, 27,589.32 and 11,607

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Solution

The fourth proportional to 19,990.50, 27,589.32 and 11,607 is: 16,019.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.50 : 27,589.32 = 11,607 : x
  2. Step 2: Convert to fraction form
    19,990.50/27,589.32 = 11,607/x
  3. Step 3: Cross multiply
    19,990.50x = 27,589.32 × 11,607
  4. Step 4: Simplify right side
    19,990.50x = 320,229,237.24
  5. Step 5: Solve for x
    x = 320,229,237.24/19,990.50
  6. Step 6: Final answer
    x = 16,019.07

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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.