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Finding the Fourth Proportional to 12,977.46, 19,447.92 and 7,422.48

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Solution

The fourth proportional to 12,977.46, 19,447.92 and 7,422.48 is: 11,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,977.46 : 19,447.92 = 7,422.48 : x
  2. Step 2: Convert to fraction form
    12,977.46/19,447.92 = 7,422.48/x
  3. Step 3: Cross multiply
    12,977.46x = 19,447.92 × 7,422.48
  4. Step 4: Simplify right side
    12,977.46x = 144,351,797.24
  5. Step 5: Solve for x
    x = 144,351,797.24/12,977.46
  6. Step 6: Final answer
    x = 11,123.27

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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.