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Finding the Fourth Proportional to 18,649.44, 25,736.40 and 10,691.28

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Solution

The fourth proportional to 18,649.44, 25,736.40 and 10,691.28 is: 14,754.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.44 : 25,736.40 = 10,691.28 : x
  2. Step 2: Convert to fraction form
    18,649.44/25,736.40 = 10,691.28/x
  3. Step 3: Cross multiply
    18,649.44x = 25,736.40 × 10,691.28
  4. Step 4: Simplify right side
    18,649.44x = 275,155,058.59
  5. Step 5: Solve for x
    x = 275,155,058.59/18,649.44
  6. Step 6: Final answer
    x = 14,754.07

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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.