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Finding the Fourth Proportional to 21,703.25, 29,940.54 and 12,750.59

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Solution

The fourth proportional to 21,703.25, 29,940.54 and 12,750.59 is: 17,589.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.25 : 29,940.54 = 12,750.59 : x
  2. Step 2: Convert to fraction form
    21,703.25/29,940.54 = 12,750.59/x
  3. Step 3: Cross multiply
    21,703.25x = 29,940.54 × 12,750.59
  4. Step 4: Simplify right side
    21,703.25x = 381,759,400.22
  5. Step 5: Solve for x
    x = 381,759,400.22/21,703.25
  6. Step 6: Final answer
    x = 17,589.97

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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.