Home / 20,769.36-31,156.04-7,618.56

Finding the Fourth Proportional to 20,769.36, 31,156.04 and 7,618.56

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Solution

The fourth proportional to 20,769.36, 31,156.04 and 7,618.56 is: 11,428.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.36 : 31,156.04 = 7,618.56 : x
  2. Step 2: Convert to fraction form
    20,769.36/31,156.04 = 7,618.56/x
  3. Step 3: Cross multiply
    20,769.36x = 31,156.04 × 7,618.56
  4. Step 4: Simplify right side
    20,769.36x = 237,364,160.10
  5. Step 5: Solve for x
    x = 237,364,160.10/20,769.36
  6. Step 6: Final answer
    x = 11,428.57

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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.