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Finding the Fourth Proportional to 19,807.88, 29,721.60 and 8,713.17

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Solution

The fourth proportional to 19,807.88, 29,721.60 and 8,713.17 is: 13,074.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,807.88 : 29,721.60 = 8,713.17 : x
  2. Step 2: Convert to fraction form
    19,807.88/29,721.60 = 8,713.17/x
  3. Step 3: Cross multiply
    19,807.88x = 29,721.60 × 8,713.17
  4. Step 4: Simplify right side
    19,807.88x = 258,969,353.47
  5. Step 5: Solve for x
    x = 258,969,353.47/19,807.88
  6. Step 6: Final answer
    x = 13,074.06

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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.