Home / 20,738.49-31,098.01-7,581.66

Finding the Fourth Proportional to 20,738.49, 31,098.01 and 7,581.66

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Solution

The fourth proportional to 20,738.49, 31,098.01 and 7,581.66 is: 11,368.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.49 : 31,098.01 = 7,581.66 : x
  2. Step 2: Convert to fraction form
    20,738.49/31,098.01 = 7,581.66/x
  3. Step 3: Cross multiply
    20,738.49x = 31,098.01 × 7,581.66
  4. Step 4: Simplify right side
    20,738.49x = 235,774,538.50
  5. Step 5: Solve for x
    x = 235,774,538.50/20,738.49
  6. Step 6: Final answer
    x = 11,368.93

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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.