Home / 13,221.15-19,826.58-6,642.75

Finding the Fourth Proportional to 13,221.15, 19,826.58 and 6,642.75

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Solution

The fourth proportional to 13,221.15, 19,826.58 and 6,642.75 is: 9,961.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.15 : 19,826.58 = 6,642.75 : x
  2. Step 2: Convert to fraction form
    13,221.15/19,826.58 = 6,642.75/x
  3. Step 3: Cross multiply
    13,221.15x = 19,826.58 × 6,642.75
  4. Step 4: Simplify right side
    13,221.15x = 131,703,014.30
  5. Step 5: Solve for x
    x = 131,703,014.30/13,221.15
  6. Step 6: Final answer
    x = 9,961.54

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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.