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Finding the Fourth Proportional to 18,538.88, 25,590.20 and 11,086.88

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Solution

The fourth proportional to 18,538.88, 25,590.20 and 11,086.88 is: 15,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,538.88 : 25,590.20 = 11,086.88 : x
  2. Step 2: Convert to fraction form
    18,538.88/25,590.20 = 11,086.88/x
  3. Step 3: Cross multiply
    18,538.88x = 25,590.20 × 11,086.88
  4. Step 4: Simplify right side
    18,538.88x = 283,715,293.19
  5. Step 5: Solve for x
    x = 283,715,293.19/18,538.88
  6. Step 6: Final answer
    x = 15,303.80

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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.