Home / 12,213.72-16,856.64-7,179.84

Finding the Fourth Proportional to 12,213.72, 16,856.64 and 7,179.84

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Solution

The fourth proportional to 12,213.72, 16,856.64 and 7,179.84 is: 9,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.72 : 16,856.64 = 7,179.84 : x
  2. Step 2: Convert to fraction form
    12,213.72/16,856.64 = 7,179.84/x
  3. Step 3: Cross multiply
    12,213.72x = 16,856.64 × 7,179.84
  4. Step 4: Simplify right side
    12,213.72x = 121,027,978.14
  5. Step 5: Solve for x
    x = 121,027,978.14/12,213.72
  6. Step 6: Final answer
    x = 9,909.18

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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.