Home / 10,391.50-14,340.21-5,675.78

Finding the Fourth Proportional to 10,391.50, 14,340.21 and 5,675.78

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Solution

The fourth proportional to 10,391.50, 14,340.21 and 5,675.78 is: 7,832.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,391.50 : 14,340.21 = 5,675.78 : x
  2. Step 2: Convert to fraction form
    10,391.50/14,340.21 = 5,675.78/x
  3. Step 3: Cross multiply
    10,391.50x = 14,340.21 × 5,675.78
  4. Step 4: Simplify right side
    10,391.50x = 81,391,891.68
  5. Step 5: Solve for x
    x = 81,391,891.68/10,391.50
  6. Step 6: Final answer
    x = 7,832.54

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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.