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Finding the Fourth Proportional to 9,137.55, 13,711.81 and 3,943.42

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Solution

The fourth proportional to 9,137.55, 13,711.81 and 3,943.42 is: 5,917.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,137.55 : 13,711.81 = 3,943.42 : x
  2. Step 2: Convert to fraction form
    9,137.55/13,711.81 = 3,943.42/x
  3. Step 3: Cross multiply
    9,137.55x = 13,711.81 × 3,943.42
  4. Step 4: Simplify right side
    9,137.55x = 54,071,425.79
  5. Step 5: Solve for x
    x = 54,071,425.79/9,137.55
  6. Step 6: Final answer
    x = 5,917.50

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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.