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Finding the Fourth Proportional to 17,891.90, 26,838.10 and 5,412.02

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Solution

The fourth proportional to 17,891.90, 26,838.10 and 5,412.02 is: 8,118.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,891.90 : 26,838.10 = 5,412.02 : x
  2. Step 2: Convert to fraction form
    17,891.90/26,838.10 = 5,412.02/x
  3. Step 3: Cross multiply
    17,891.90x = 26,838.10 × 5,412.02
  4. Step 4: Simplify right side
    17,891.90x = 145,248,333.96
  5. Step 5: Solve for x
    x = 145,248,333.96/17,891.90
  6. Step 6: Final answer
    x = 8,118.11

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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.