Home / 20,992.72-28,957.64-12,611.28

Finding the Fourth Proportional to 20,992.72, 28,957.64 and 12,611.28

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Solution

The fourth proportional to 20,992.72, 28,957.64 and 12,611.28 is: 17,396.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.72 : 28,957.64 = 12,611.28 : x
  2. Step 2: Convert to fraction form
    20,992.72/28,957.64 = 12,611.28/x
  3. Step 3: Cross multiply
    20,992.72x = 28,957.64 × 12,611.28
  4. Step 4: Simplify right side
    20,992.72x = 365,192,906.18
  5. Step 5: Solve for x
    x = 365,192,906.18/20,992.72
  6. Step 6: Final answer
    x = 17,396.17

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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.