Home / 19,930.66-29,898.96-12,428.11

Finding the Fourth Proportional to 19,930.66, 29,898.96 and 12,428.11

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Solution

The fourth proportional to 19,930.66, 29,898.96 and 12,428.11 is: 18,644.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.66 : 29,898.96 = 12,428.11 : x
  2. Step 2: Convert to fraction form
    19,930.66/29,898.96 = 12,428.11/x
  3. Step 3: Cross multiply
    19,930.66x = 29,898.96 × 12,428.11
  4. Step 4: Simplify right side
    19,930.66x = 371,587,563.77
  5. Step 5: Solve for x
    x = 371,587,563.77/19,930.66
  6. Step 6: Final answer
    x = 18,644.02

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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.