Home / 21,120.66-31,678.11-5,536.98

Finding the Fourth Proportional to 21,120.66, 31,678.11 and 5,536.98

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Solution

The fourth proportional to 21,120.66, 31,678.11 and 5,536.98 is: 8,304.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.66 : 31,678.11 = 5,536.98 : x
  2. Step 2: Convert to fraction form
    21,120.66/31,678.11 = 5,536.98/x
  3. Step 3: Cross multiply
    21,120.66x = 31,678.11 × 5,536.98
  4. Step 4: Simplify right side
    21,120.66x = 175,401,061.51
  5. Step 5: Solve for x
    x = 175,401,061.51/21,120.66
  6. Step 6: Final answer
    x = 8,304.71

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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.