Home / 11,171.87-15,412.89-6,390.85

Finding the Fourth Proportional to 11,171.87, 15,412.89 and 6,390.85

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Solution

The fourth proportional to 11,171.87, 15,412.89 and 6,390.85 is: 8,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.87 : 15,412.89 = 6,390.85 : x
  2. Step 2: Convert to fraction form
    11,171.87/15,412.89 = 6,390.85/x
  3. Step 3: Cross multiply
    11,171.87x = 15,412.89 × 6,390.85
  4. Step 4: Simplify right side
    11,171.87x = 98,501,390.99
  5. Step 5: Solve for x
    x = 98,501,390.99/11,171.87
  6. Step 6: Final answer
    x = 8,816.91

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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.