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Finding the Fourth Proportional to 20,039, 27,651.64 and 11,085.08

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Solution

The fourth proportional to 20,039, 27,651.64 and 11,085.08 is: 15,296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039 : 27,651.64 = 11,085.08 : x
  2. Step 2: Convert to fraction form
    20,039/27,651.64 = 11,085.08/x
  3. Step 3: Cross multiply
    20,039x = 27,651.64 × 11,085.08
  4. Step 4: Simplify right side
    20,039x = 306,520,641.53
  5. Step 5: Solve for x
    x = 306,520,641.53/20,039
  6. Step 6: Final answer
    x = 15,296.20

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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.