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Finding the Fourth Proportional to 13,927.15, 20,919.89 and 11,740.15

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Solution

The fourth proportional to 13,927.15, 20,919.89 and 11,740.15 is: 17,634.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,927.15 : 20,919.89 = 11,740.15 : x
  2. Step 2: Convert to fraction form
    13,927.15/20,919.89 = 11,740.15/x
  3. Step 3: Cross multiply
    13,927.15x = 20,919.89 × 11,740.15
  4. Step 4: Simplify right side
    13,927.15x = 245,602,646.58
  5. Step 5: Solve for x
    x = 245,602,646.58/13,927.15
  6. Step 6: Final answer
    x = 17,634.81

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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.