Home / 12,879.30-19,286.55-8,472.90

Finding the Fourth Proportional to 12,879.30, 19,286.55 and 8,472.90

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Solution

The fourth proportional to 12,879.30, 19,286.55 and 8,472.90 is: 12,688.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.30 : 19,286.55 = 8,472.90 : x
  2. Step 2: Convert to fraction form
    12,879.30/19,286.55 = 8,472.90/x
  3. Step 3: Cross multiply
    12,879.30x = 19,286.55 × 8,472.90
  4. Step 4: Simplify right side
    12,879.30x = 163,413,009.50
  5. Step 5: Solve for x
    x = 163,413,009.50/12,879.30
  6. Step 6: Final answer
    x = 12,688.04

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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.