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Finding the Fourth Proportional to 21,039, 29,033.19 and 11,479.08

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Solution

The fourth proportional to 21,039, 29,033.19 and 11,479.08 is: 15,840.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039 : 29,033.19 = 11,479.08 : x
  2. Step 2: Convert to fraction form
    21,039/29,033.19 = 11,479.08/x
  3. Step 3: Cross multiply
    21,039x = 29,033.19 × 11,479.08
  4. Step 4: Simplify right side
    21,039x = 333,274,310.67
  5. Step 5: Solve for x
    x = 333,274,310.67/21,039
  6. Step 6: Final answer
    x = 15,840.79

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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.