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Finding the Fourth Proportional to 34,617.92, 51,921.28 and 12,430.72

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Solution

The fourth proportional to 34,617.92, 51,921.28 and 12,430.72 is: 18,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,617.92 : 51,921.28 = 12,430.72 : x
  2. Step 2: Convert to fraction form
    34,617.92/51,921.28 = 12,430.72/x
  3. Step 3: Cross multiply
    34,617.92x = 51,921.28 × 12,430.72
  4. Step 4: Simplify right side
    34,617.92x = 645,418,893.72
  5. Step 5: Solve for x
    x = 645,418,893.72/34,617.92
  6. Step 6: Final answer
    x = 18,644.07

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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.