Home / 6,687.36-9,231.90-4,331.40

Finding the Fourth Proportional to 6,687.36, 9,231.90 and 4,331.40

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Solution

The fourth proportional to 6,687.36, 9,231.90 and 4,331.40 is: 5,979.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.36 : 9,231.90 = 4,331.40 : x
  2. Step 2: Convert to fraction form
    6,687.36/9,231.90 = 4,331.40/x
  3. Step 3: Cross multiply
    6,687.36x = 9,231.90 × 4,331.40
  4. Step 4: Simplify right side
    6,687.36x = 39,987,051.66
  5. Step 5: Solve for x
    x = 39,987,051.66/6,687.36
  6. Step 6: Final answer
    x = 5,979.50

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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.