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Finding the Fourth Proportional to 12,807.99, 19,217.92 and 5,414.17

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Solution

The fourth proportional to 12,807.99, 19,217.92 and 5,414.17 is: 8,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.99 : 19,217.92 = 5,414.17 : x
  2. Step 2: Convert to fraction form
    12,807.99/19,217.92 = 5,414.17/x
  3. Step 3: Cross multiply
    12,807.99x = 19,217.92 × 5,414.17
  4. Step 4: Simplify right side
    12,807.99x = 104,049,085.93
  5. Step 5: Solve for x
    x = 104,049,085.93/12,807.99
  6. Step 6: Final answer
    x = 8,123.76

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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.