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Finding the Fourth Proportional to 13,276.52, 19,881.92 and 7,712.99

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Solution

The fourth proportional to 13,276.52, 19,881.92 and 7,712.99 is: 11,550.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,276.52 : 19,881.92 = 7,712.99 : x
  2. Step 2: Convert to fraction form
    13,276.52/19,881.92 = 7,712.99/x
  3. Step 3: Cross multiply
    13,276.52x = 19,881.92 × 7,712.99
  4. Step 4: Simplify right side
    13,276.52x = 153,348,912.17
  5. Step 5: Solve for x
    x = 153,348,912.17/13,276.52
  6. Step 6: Final answer
    x = 11,550.39

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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.