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Finding the Fourth Proportional to 12,139.88, 16,754.65 and 7,950.56

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Solution

The fourth proportional to 12,139.88, 16,754.65 and 7,950.56 is: 10,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.88 : 16,754.65 = 7,950.56 : x
  2. Step 2: Convert to fraction form
    12,139.88/16,754.65 = 7,950.56/x
  3. Step 3: Cross multiply
    12,139.88x = 16,754.65 × 7,950.56
  4. Step 4: Simplify right side
    12,139.88x = 133,208,746.45
  5. Step 5: Solve for x
    x = 133,208,746.45/12,139.88
  6. Step 6: Final answer
    x = 10,972.83

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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.