Home / 10,961.84-15,115.44-6,977.86

Finding the Fourth Proportional to 10,961.84, 15,115.44 and 6,977.86

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Solution

The fourth proportional to 10,961.84, 15,115.44 and 6,977.86 is: 9,621.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.84 : 15,115.44 = 6,977.86 : x
  2. Step 2: Convert to fraction form
    10,961.84/15,115.44 = 6,977.86/x
  3. Step 3: Cross multiply
    10,961.84x = 15,115.44 × 6,977.86
  4. Step 4: Simplify right side
    10,961.84x = 105,473,412.54
  5. Step 5: Solve for x
    x = 105,473,412.54/10,961.84
  6. Step 6: Final answer
    x = 9,621.87

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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.