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Finding the Fourth Proportional to 15,101.11, 20,839.81 and 8,387.36

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Solution

The fourth proportional to 15,101.11, 20,839.81 and 8,387.36 is: 11,574.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.11 : 20,839.81 = 8,387.36 : x
  2. Step 2: Convert to fraction form
    15,101.11/20,839.81 = 8,387.36/x
  3. Step 3: Cross multiply
    15,101.11x = 20,839.81 × 8,387.36
  4. Step 4: Simplify right side
    15,101.11x = 174,791,051.39
  5. Step 5: Solve for x
    x = 174,791,051.39/15,101.11
  6. Step 6: Final answer
    x = 11,574.71

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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.