Home / 20,005.12-29,965.52-11,119.92

Finding the Fourth Proportional to 20,005.12, 29,965.52 and 11,119.92

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Solution

The fourth proportional to 20,005.12, 29,965.52 and 11,119.92 is: 16,656.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.12 : 29,965.52 = 11,119.92 : x
  2. Step 2: Convert to fraction form
    20,005.12/29,965.52 = 11,119.92/x
  3. Step 3: Cross multiply
    20,005.12x = 29,965.52 × 11,119.92
  4. Step 4: Simplify right side
    20,005.12x = 333,214,185.16
  5. Step 5: Solve for x
    x = 333,214,185.16/20,005.12
  6. Step 6: Final answer
    x = 16,656.45

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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.