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Finding the Fourth Proportional to 7,137.81, 10,711.56 and 2,520.81

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Solution

The fourth proportional to 7,137.81, 10,711.56 and 2,520.81 is: 3,782.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,137.81 : 10,711.56 = 2,520.81 : x
  2. Step 2: Convert to fraction form
    7,137.81/10,711.56 = 2,520.81/x
  3. Step 3: Cross multiply
    7,137.81x = 10,711.56 × 2,520.81
  4. Step 4: Simplify right side
    7,137.81x = 27,001,807.56
  5. Step 5: Solve for x
    x = 27,001,807.56/7,137.81
  6. Step 6: Final answer
    x = 3,782.93

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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.