Home / 19,905.81-29,869.20-8,820.15

Finding the Fourth Proportional to 19,905.81, 29,869.20 and 8,820.15

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Solution

The fourth proportional to 19,905.81, 29,869.20 and 8,820.15 is: 13,234.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,905.81 : 29,869.20 = 8,820.15 : x
  2. Step 2: Convert to fraction form
    19,905.81/29,869.20 = 8,820.15/x
  3. Step 3: Cross multiply
    19,905.81x = 29,869.20 × 8,820.15
  4. Step 4: Simplify right side
    19,905.81x = 263,450,824.38
  5. Step 5: Solve for x
    x = 263,450,824.38/19,905.81
  6. Step 6: Final answer
    x = 13,234.87

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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.