Home / 12,930.92-19,398.30-4,721

Finding the Fourth Proportional to 12,930.92, 19,398.30 and 4,721

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Solution

The fourth proportional to 12,930.92, 19,398.30 and 4,721 is: 7,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.92 : 19,398.30 = 4,721 : x
  2. Step 2: Convert to fraction form
    12,930.92/19,398.30 = 4,721/x
  3. Step 3: Cross multiply
    12,930.92x = 19,398.30 × 4,721
  4. Step 4: Simplify right side
    12,930.92x = 91,579,374.30
  5. Step 5: Solve for x
    x = 91,579,374.30/12,930.92
  6. Step 6: Final answer
    x = 7,082.20

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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.