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Finding the Fourth Proportional to 15,190.61, 20,945.66 and 12,797.06

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Solution

The fourth proportional to 15,190.61, 20,945.66 and 12,797.06 is: 17,645.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,190.61 : 20,945.66 = 12,797.06 : x
  2. Step 2: Convert to fraction form
    15,190.61/20,945.66 = 12,797.06/x
  3. Step 3: Cross multiply
    15,190.61x = 20,945.66 × 12,797.06
  4. Step 4: Simplify right side
    15,190.61x = 268,042,699.05
  5. Step 5: Solve for x
    x = 268,042,699.05/15,190.61
  6. Step 6: Final answer
    x = 17,645.29

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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.