Home / 8,439.24-11,642.58-5,645.64

Finding the Fourth Proportional to 8,439.24, 11,642.58 and 5,645.64

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Solution

The fourth proportional to 8,439.24, 11,642.58 and 5,645.64 is: 7,788.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.24 : 11,642.58 = 5,645.64 : x
  2. Step 2: Convert to fraction form
    8,439.24/11,642.58 = 5,645.64/x
  3. Step 3: Cross multiply
    8,439.24x = 11,642.58 × 5,645.64
  4. Step 4: Simplify right side
    8,439.24x = 65,729,815.35
  5. Step 5: Solve for x
    x = 65,729,815.35/8,439.24
  6. Step 6: Final answer
    x = 7,788.59

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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.