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Finding the Fourth Proportional to 18,642.44, 25,726.62 and 10,144.64

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Solution

The fourth proportional to 18,642.44, 25,726.62 and 10,144.64 is: 13,999.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.44 : 25,726.62 = 10,144.64 : x
  2. Step 2: Convert to fraction form
    18,642.44/25,726.62 = 10,144.64/x
  3. Step 3: Cross multiply
    18,642.44x = 25,726.62 × 10,144.64
  4. Step 4: Simplify right side
    18,642.44x = 260,987,298.32
  5. Step 5: Solve for x
    x = 260,987,298.32/18,642.44
  6. Step 6: Final answer
    x = 13,999.63

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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.