Home / 21,146.96-31,719.38-8,663.85

Finding the Fourth Proportional to 21,146.96, 31,719.38 and 8,663.85

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Solution

The fourth proportional to 21,146.96, 31,719.38 and 8,663.85 is: 12,995.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.96 : 31,719.38 = 8,663.85 : x
  2. Step 2: Convert to fraction form
    21,146.96/31,719.38 = 8,663.85/x
  3. Step 3: Cross multiply
    21,146.96x = 31,719.38 × 8,663.85
  4. Step 4: Simplify right side
    21,146.96x = 274,811,950.41
  5. Step 5: Solve for x
    x = 274,811,950.41/21,146.96
  6. Step 6: Final answer
    x = 12,995.34

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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.