Home / 9,781.91-13,499.11-5,305.85

Finding the Fourth Proportional to 9,781.91, 13,499.11 and 5,305.85

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Solution

The fourth proportional to 9,781.91, 13,499.11 and 5,305.85 is: 7,322.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781.91 : 13,499.11 = 5,305.85 : x
  2. Step 2: Convert to fraction form
    9,781.91/13,499.11 = 5,305.85/x
  3. Step 3: Cross multiply
    9,781.91x = 13,499.11 × 5,305.85
  4. Step 4: Simplify right side
    9,781.91x = 71,624,288.64
  5. Step 5: Solve for x
    x = 71,624,288.64/9,781.91
  6. Step 6: Final answer
    x = 7,322.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.