Home / 20,287.35-30,437.10-7,808.49

Finding the Fourth Proportional to 20,287.35, 30,437.10 and 7,808.49

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Solution

The fourth proportional to 20,287.35, 30,437.10 and 7,808.49 is: 11,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.35 : 30,437.10 = 7,808.49 : x
  2. Step 2: Convert to fraction form
    20,287.35/30,437.10 = 7,808.49/x
  3. Step 3: Cross multiply
    20,287.35x = 30,437.10 × 7,808.49
  4. Step 4: Simplify right side
    20,287.35x = 237,667,790.98
  5. Step 5: Solve for x
    x = 237,667,790.98/20,287.35
  6. Step 6: Final answer
    x = 11,715.07

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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.