Home / 10,991.91-15,169.11-6,276.63

Finding the Fourth Proportional to 10,991.91, 15,169.11 and 6,276.63

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Solution

The fourth proportional to 10,991.91, 15,169.11 and 6,276.63 is: 8,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.91 : 15,169.11 = 6,276.63 : x
  2. Step 2: Convert to fraction form
    10,991.91/15,169.11 = 6,276.63/x
  3. Step 3: Cross multiply
    10,991.91x = 15,169.11 × 6,276.63
  4. Step 4: Simplify right side
    10,991.91x = 95,210,890.90
  5. Step 5: Solve for x
    x = 95,210,890.90/10,991.91
  6. Step 6: Final answer
    x = 8,661.91

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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.