Home / 21,306.87-31,960.29-6,515.78

Finding the Fourth Proportional to 21,306.87, 31,960.29 and 6,515.78

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Solution

The fourth proportional to 21,306.87, 31,960.29 and 6,515.78 is: 9,773.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.87 : 31,960.29 = 6,515.78 : x
  2. Step 2: Convert to fraction form
    21,306.87/31,960.29 = 6,515.78/x
  3. Step 3: Cross multiply
    21,306.87x = 31,960.29 × 6,515.78
  4. Step 4: Simplify right side
    21,306.87x = 208,246,218.38
  5. Step 5: Solve for x
    x = 208,246,218.38/21,306.87
  6. Step 6: Final answer
    x = 9,773.67

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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.