Home / 12,422.40-17,137.85-7,043.70

Finding the Fourth Proportional to 12,422.40, 17,137.85 and 7,043.70

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Solution

The fourth proportional to 12,422.40, 17,137.85 and 7,043.70 is: 9,717.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422.40 : 17,137.85 = 7,043.70 : x
  2. Step 2: Convert to fraction form
    12,422.40/17,137.85 = 7,043.70/x
  3. Step 3: Cross multiply
    12,422.40x = 17,137.85 × 7,043.70
  4. Step 4: Simplify right side
    12,422.40x = 120,713,838.83
  5. Step 5: Solve for x
    x = 120,713,838.83/12,422.40
  6. Step 6: Final answer
    x = 9,717.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.