Home / 11,385.70-17,077.59-6,439.78

Finding the Fourth Proportional to 11,385.70, 17,077.59 and 6,439.78

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Solution

The fourth proportional to 11,385.70, 17,077.59 and 6,439.78 is: 9,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.70 : 17,077.59 = 6,439.78 : x
  2. Step 2: Convert to fraction form
    11,385.70/17,077.59 = 6,439.78/x
  3. Step 3: Cross multiply
    11,385.70x = 17,077.59 × 6,439.78
  4. Step 4: Simplify right side
    11,385.70x = 109,975,922.53
  5. Step 5: Solve for x
    x = 109,975,922.53/11,385.70
  6. Step 6: Final answer
    x = 9,659.13

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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.