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Finding the Fourth Proportional to 7,009.18, 10,515.81 and 3,721.81

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Solution

The fourth proportional to 7,009.18, 10,515.81 and 3,721.81 is: 5,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,009.18 : 10,515.81 = 3,721.81 : x
  2. Step 2: Convert to fraction form
    7,009.18/10,515.81 = 3,721.81/x
  3. Step 3: Cross multiply
    7,009.18x = 10,515.81 × 3,721.81
  4. Step 4: Simplify right side
    7,009.18x = 39,137,846.82
  5. Step 5: Solve for x
    x = 39,137,846.82/7,009.18
  6. Step 6: Final answer
    x = 5,583.80

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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.