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Finding the Fourth Proportional to 12,959.84, 19,463.18 and 11,917.92

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Solution

The fourth proportional to 12,959.84, 19,463.18 and 11,917.92 is: 17,898.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,959.84 : 19,463.18 = 11,917.92 : x
  2. Step 2: Convert to fraction form
    12,959.84/19,463.18 = 11,917.92/x
  3. Step 3: Cross multiply
    12,959.84x = 19,463.18 × 11,917.92
  4. Step 4: Simplify right side
    12,959.84x = 231,960,622.19
  5. Step 5: Solve for x
    x = 231,960,622.19/12,959.84
  6. Step 6: Final answer
    x = 17,898.42

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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.