Home / 7,122.20-10,661.70-5,379.80

Finding the Fourth Proportional to 7,122.20, 10,661.70 and 5,379.80

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Solution

The fourth proportional to 7,122.20, 10,661.70 and 5,379.80 is: 8,053.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.20 : 10,661.70 = 5,379.80 : x
  2. Step 2: Convert to fraction form
    7,122.20/10,661.70 = 5,379.80/x
  3. Step 3: Cross multiply
    7,122.20x = 10,661.70 × 5,379.80
  4. Step 4: Simplify right side
    7,122.20x = 57,357,813.66
  5. Step 5: Solve for x
    x = 57,357,813.66/7,122.20
  6. Step 6: Final answer
    x = 8,053.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.