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Finding the Fourth Proportional to 15,111.05, 20,852.03 and 8,738.05

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Solution

The fourth proportional to 15,111.05, 20,852.03 and 8,738.05 is: 12,057.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.05 : 20,852.03 = 8,738.05 : x
  2. Step 2: Convert to fraction form
    15,111.05/20,852.03 = 8,738.05/x
  3. Step 3: Cross multiply
    15,111.05x = 20,852.03 × 8,738.05
  4. Step 4: Simplify right side
    15,111.05x = 182,206,080.74
  5. Step 5: Solve for x
    x = 182,206,080.74/15,111.05
  6. Step 6: Final answer
    x = 12,057.80

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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.