Home / 12,890.92-19,308.30-7,961.80

Finding the Fourth Proportional to 12,890.92, 19,308.30 and 7,961.80

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Solution

The fourth proportional to 12,890.92, 19,308.30 and 7,961.80 is: 11,925.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.92 : 19,308.30 = 7,961.80 : x
  2. Step 2: Convert to fraction form
    12,890.92/19,308.30 = 7,961.80/x
  3. Step 3: Cross multiply
    12,890.92x = 19,308.30 × 7,961.80
  4. Step 4: Simplify right side
    12,890.92x = 153,728,822.94
  5. Step 5: Solve for x
    x = 153,728,822.94/12,890.92
  6. Step 6: Final answer
    x = 11,925.36

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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.