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Finding the Fourth Proportional to 21,039, 29,033.85 and 11,608.20

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Solution

The fourth proportional to 21,039, 29,033.85 and 11,608.20 is: 16,019.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039 : 29,033.85 = 11,608.20 : x
  2. Step 2: Convert to fraction form
    21,039/29,033.85 = 11,608.20/x
  3. Step 3: Cross multiply
    21,039x = 29,033.85 × 11,608.20
  4. Step 4: Simplify right side
    21,039x = 337,030,737.57
  5. Step 5: Solve for x
    x = 337,030,737.57/21,039
  6. Step 6: Final answer
    x = 16,019.33

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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.