Home / 21,171.60-29,213.64-11,740.20

Finding the Fourth Proportional to 21,171.60, 29,213.64 and 11,740.20

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Solution

The fourth proportional to 21,171.60, 29,213.64 and 11,740.20 is: 16,199.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.60 : 29,213.64 = 11,740.20 : x
  2. Step 2: Convert to fraction form
    21,171.60/29,213.64 = 11,740.20/x
  3. Step 3: Cross multiply
    21,171.60x = 29,213.64 × 11,740.20
  4. Step 4: Simplify right side
    21,171.60x = 342,973,976.33
  5. Step 5: Solve for x
    x = 342,973,976.33/21,171.60
  6. Step 6: Final answer
    x = 16,199.72

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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.