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Finding the Fourth Proportional to 18,540.58, 25,565.50 and 11,815.56

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Solution

The fourth proportional to 18,540.58, 25,565.50 and 11,815.56 is: 16,292.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,540.58 : 25,565.50 = 11,815.56 : x
  2. Step 2: Convert to fraction form
    18,540.58/25,565.50 = 11,815.56/x
  3. Step 3: Cross multiply
    18,540.58x = 25,565.50 × 11,815.56
  4. Step 4: Simplify right side
    18,540.58x = 302,070,699.18
  5. Step 5: Solve for x
    x = 302,070,699.18/18,540.58
  6. Step 6: Final answer
    x = 16,292.41

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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.