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Finding the Fourth Proportional to 20,015.59, 30,013.59 and 11,697.70

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Solution

The fourth proportional to 20,015.59, 30,013.59 and 11,697.70 is: 17,540.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.59 : 30,013.59 = 11,697.70 : x
  2. Step 2: Convert to fraction form
    20,015.59/30,013.59 = 11,697.70/x
  3. Step 3: Cross multiply
    20,015.59x = 30,013.59 × 11,697.70
  4. Step 4: Simplify right side
    20,015.59x = 351,089,971.74
  5. Step 5: Solve for x
    x = 351,089,971.74/20,015.59
  6. Step 6: Final answer
    x = 17,540.83

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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.