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Finding the Fourth Proportional to 9,992.72, 14,991.74 and 3,418.90

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Solution

The fourth proportional to 9,992.72, 14,991.74 and 3,418.90 is: 5,129.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,992.72 : 14,991.74 = 3,418.90 : x
  2. Step 2: Convert to fraction form
    9,992.72/14,991.74 = 3,418.90/x
  3. Step 3: Cross multiply
    9,992.72x = 14,991.74 × 3,418.90
  4. Step 4: Simplify right side
    9,992.72x = 51,255,259.89
  5. Step 5: Solve for x
    x = 51,255,259.89/9,992.72
  6. Step 6: Final answer
    x = 5,129.26

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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.