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Finding the Fourth Proportional to 15,404, 21,257.43 and 8,330.40

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Solution

The fourth proportional to 15,404, 21,257.43 and 8,330.40 is: 11,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404 : 21,257.43 = 8,330.40 : x
  2. Step 2: Convert to fraction form
    15,404/21,257.43 = 8,330.40/x
  3. Step 3: Cross multiply
    15,404x = 21,257.43 × 8,330.40
  4. Step 4: Simplify right side
    15,404x = 177,082,894.87
  5. Step 5: Solve for x
    x = 177,082,894.87/15,404
  6. Step 6: Final answer
    x = 11,495.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.