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Finding the Fourth Proportional to 17,990.66, 26,988.95 and 5,509.42

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Solution

The fourth proportional to 17,990.66, 26,988.95 and 5,509.42 is: 8,265.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,990.66 : 26,988.95 = 5,509.42 : x
  2. Step 2: Convert to fraction form
    17,990.66/26,988.95 = 5,509.42/x
  3. Step 3: Cross multiply
    17,990.66x = 26,988.95 × 5,509.42
  4. Step 4: Simplify right side
    17,990.66x = 148,693,376.22
  5. Step 5: Solve for x
    x = 148,693,376.22/17,990.66
  6. Step 6: Final answer
    x = 8,265.03

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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.