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Finding the Fourth Proportional to 18,642.76, 25,726.68 and 10,144.59

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Solution

The fourth proportional to 18,642.76, 25,726.68 and 10,144.59 is: 13,999.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,642.76 : 25,726.68 = 10,144.59 : x
  2. Step 2: Convert to fraction form
    18,642.76/25,726.68 = 10,144.59/x
  3. Step 3: Cross multiply
    18,642.76x = 25,726.68 × 10,144.59
  4. Step 4: Simplify right side
    18,642.76x = 260,986,626.10
  5. Step 5: Solve for x
    x = 260,986,626.10/18,642.76
  6. Step 6: Final answer
    x = 13,999.36

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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.