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Finding the Fourth Proportional to 9,992.69, 14,991.36 and 3,418.89

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Solution

The fourth proportional to 9,992.69, 14,991.36 and 3,418.89 is: 5,129.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,992.69 : 14,991.36 = 3,418.89 : x
  2. Step 2: Convert to fraction form
    9,992.69/14,991.36 = 3,418.89/x
  3. Step 3: Cross multiply
    9,992.69x = 14,991.36 × 3,418.89
  4. Step 4: Simplify right side
    9,992.69x = 51,253,810.79
  5. Step 5: Solve for x
    x = 51,253,810.79/9,992.69
  6. Step 6: Final answer
    x = 5,129.13

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1.5x scale

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.