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Finding the Fourth Proportional to 18,642.55, 25,726.84 and 10,144.74

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Solution

The fourth proportional to 18,642.55, 25,726.84 and 10,144.74 is: 13,999.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.55 : 25,726.84 = 10,144.74 : x
  2. Step 2: Convert to fraction form
    18,642.55/25,726.84 = 10,144.74/x
  3. Step 3: Cross multiply
    18,642.55x = 25,726.84 × 10,144.74
  4. Step 4: Simplify right side
    18,642.55x = 260,992,102.82
  5. Step 5: Solve for x
    x = 260,992,102.82/18,642.55
  6. Step 6: Final answer
    x = 13,999.81

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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.