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Finding the Fourth Proportional to 20,185.58, 30,288.90 and 11,437.58

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Solution

The fourth proportional to 20,185.58, 30,288.90 and 11,437.58 is: 17,162.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.58 : 30,288.90 = 11,437.58 : x
  2. Step 2: Convert to fraction form
    20,185.58/30,288.90 = 11,437.58/x
  3. Step 3: Cross multiply
    20,185.58x = 30,288.90 × 11,437.58
  4. Step 4: Simplify right side
    20,185.58x = 346,431,716.86
  5. Step 5: Solve for x
    x = 346,431,716.86/20,185.58
  6. Step 6: Final answer
    x = 17,162.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.