Home / 12,433.86-17,156.97-7,128.90

Finding the Fourth Proportional to 12,433.86, 17,156.97 and 7,128.90

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Solution

The fourth proportional to 12,433.86, 17,156.97 and 7,128.90 is: 9,836.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,433.86 : 17,156.97 = 7,128.90 : x
  2. Step 2: Convert to fraction form
    12,433.86/17,156.97 = 7,128.90/x
  3. Step 3: Cross multiply
    12,433.86x = 17,156.97 × 7,128.90
  4. Step 4: Simplify right side
    12,433.86x = 122,310,323.43
  5. Step 5: Solve for x
    x = 122,310,323.43/12,433.86
  6. Step 6: Final answer
    x = 9,836.87

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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.