Home / 20,988.82-31,502.67-10,607.86

Finding the Fourth Proportional to 20,988.82, 31,502.67 and 10,607.86

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Solution

The fourth proportional to 20,988.82, 31,502.67 and 10,607.86 is: 15,921.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.82 : 31,502.67 = 10,607.86 : x
  2. Step 2: Convert to fraction form
    20,988.82/31,502.67 = 10,607.86/x
  3. Step 3: Cross multiply
    20,988.82x = 31,502.67 × 10,607.86
  4. Step 4: Simplify right side
    20,988.82x = 334,175,912.99
  5. Step 5: Solve for x
    x = 334,175,912.99/20,988.82
  6. Step 6: Final answer
    x = 15,921.62

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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.