Home / 8,390.40-11,558.75-5,867.79

Finding the Fourth Proportional to 8,390.40, 11,558.75 and 5,867.79

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Solution

The fourth proportional to 8,390.40, 11,558.75 and 5,867.79 is: 8,083.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.40 : 11,558.75 = 5,867.79 : x
  2. Step 2: Convert to fraction form
    8,390.40/11,558.75 = 5,867.79/x
  3. Step 3: Cross multiply
    8,390.40x = 11,558.75 × 5,867.79
  4. Step 4: Simplify right side
    8,390.40x = 67,824,317.66
  5. Step 5: Solve for x
    x = 67,824,317.66/8,390.40
  6. Step 6: Final answer
    x = 8,083.56

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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.