Home / 12,865.78-19,302.32-6,630.36

Finding the Fourth Proportional to 12,865.78, 19,302.32 and 6,630.36

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Solution

The fourth proportional to 12,865.78, 19,302.32 and 6,630.36 is: 9,947.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.78 : 19,302.32 = 6,630.36 : x
  2. Step 2: Convert to fraction form
    12,865.78/19,302.32 = 6,630.36/x
  3. Step 3: Cross multiply
    12,865.78x = 19,302.32 × 6,630.36
  4. Step 4: Simplify right side
    12,865.78x = 127,981,330.44
  5. Step 5: Solve for x
    x = 127,981,330.44/12,865.78
  6. Step 6: Final answer
    x = 9,947.42

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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.