Home / 7,961.90-11,888.78-6,299.78

Finding the Fourth Proportional to 7,961.90, 11,888.78 and 6,299.78

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Solution

The fourth proportional to 7,961.90, 11,888.78 and 6,299.78 is: 9,406.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.90 : 11,888.78 = 6,299.78 : x
  2. Step 2: Convert to fraction form
    7,961.90/11,888.78 = 6,299.78/x
  3. Step 3: Cross multiply
    7,961.90x = 11,888.78 × 6,299.78
  4. Step 4: Simplify right side
    7,961.90x = 74,896,607.53
  5. Step 5: Solve for x
    x = 74,896,607.53/7,961.90
  6. Step 6: Final answer
    x = 9,406.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.