Home / 12,765.87-19,158.17-8,381.79

Finding the Fourth Proportional to 12,765.87, 19,158.17 and 8,381.79

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Solution

The fourth proportional to 12,765.87, 19,158.17 and 8,381.79 is: 12,578.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,765.87 : 19,158.17 = 8,381.79 : x
  2. Step 2: Convert to fraction form
    12,765.87/19,158.17 = 8,381.79/x
  3. Step 3: Cross multiply
    12,765.87x = 19,158.17 × 8,381.79
  4. Step 4: Simplify right side
    12,765.87x = 160,579,715.82
  5. Step 5: Solve for x
    x = 160,579,715.82/12,765.87
  6. Step 6: Final answer
    x = 12,578.83

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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.