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Finding the Fourth Proportional to 12,791.60, 19,207.20 and 6,959.60

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Solution

The fourth proportional to 12,791.60, 19,207.20 and 6,959.60 is: 10,450.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.60 : 19,207.20 = 6,959.60 : x
  2. Step 2: Convert to fraction form
    12,791.60/19,207.20 = 6,959.60/x
  3. Step 3: Cross multiply
    12,791.60x = 19,207.20 × 6,959.60
  4. Step 4: Simplify right side
    12,791.60x = 133,674,429.12
  5. Step 5: Solve for x
    x = 133,674,429.12/12,791.60
  6. Step 6: Final answer
    x = 10,450.17

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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.