Home / 7,821.69-11,731.63-3,141.51

Finding the Fourth Proportional to 7,821.69, 11,731.63 and 3,141.51

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Solution

The fourth proportional to 7,821.69, 11,731.63 and 3,141.51 is: 4,711.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.69 : 11,731.63 = 3,141.51 : x
  2. Step 2: Convert to fraction form
    7,821.69/11,731.63 = 3,141.51/x
  3. Step 3: Cross multiply
    7,821.69x = 11,731.63 × 3,141.51
  4. Step 4: Simplify right side
    7,821.69x = 36,855,044.16
  5. Step 5: Solve for x
    x = 36,855,044.16/7,821.69
  6. Step 6: Final answer
    x = 4,711.90

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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.