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Finding the Fourth Proportional to 9,919.89, 14,879.87 and 3,346.13

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Solution

The fourth proportional to 9,919.89, 14,879.87 and 3,346.13 is: 5,019.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.89 : 14,879.87 = 3,346.13 : x
  2. Step 2: Convert to fraction form
    9,919.89/14,879.87 = 3,346.13/x
  3. Step 3: Cross multiply
    9,919.89x = 14,879.87 × 3,346.13
  4. Step 4: Simplify right side
    9,919.89x = 49,789,950.57
  5. Step 5: Solve for x
    x = 49,789,950.57/9,919.89
  6. Step 6: Final answer
    x = 5,019.21

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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.