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Finding the Fourth Proportional to 15,793.76, 21,791.44 and 9,416.32

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Solution

The fourth proportional to 15,793.76, 21,791.44 and 9,416.32 is: 12,992.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,793.76 : 21,791.44 = 9,416.32 : x
  2. Step 2: Convert to fraction form
    15,793.76/21,791.44 = 9,416.32/x
  3. Step 3: Cross multiply
    15,793.76x = 21,791.44 × 9,416.32
  4. Step 4: Simplify right side
    15,793.76x = 205,195,172.30
  5. Step 5: Solve for x
    x = 205,195,172.30/15,793.76
  6. Step 6: Final answer
    x = 12,992.17

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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.