Home / 12,890.91-19,318.13-5,487.92

Finding the Fourth Proportional to 12,890.91, 19,318.13 and 5,487.92

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Solution

The fourth proportional to 12,890.91, 19,318.13 and 5,487.92 is: 8,224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.91 : 19,318.13 = 5,487.92 : x
  2. Step 2: Convert to fraction form
    12,890.91/19,318.13 = 5,487.92/x
  3. Step 3: Cross multiply
    12,890.91x = 19,318.13 × 5,487.92
  4. Step 4: Simplify right side
    12,890.91x = 106,016,320.98
  5. Step 5: Solve for x
    x = 106,016,320.98/12,890.91
  6. Step 6: Final answer
    x = 8,224.11

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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.