Home / 11,311.80-15,618.37-7,543.85

Finding the Fourth Proportional to 11,311.80, 15,618.37 and 7,543.85

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Solution

The fourth proportional to 11,311.80, 15,618.37 and 7,543.85 is: 10,415.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,311.80 : 15,618.37 = 7,543.85 : x
  2. Step 2: Convert to fraction form
    11,311.80/15,618.37 = 7,543.85/x
  3. Step 3: Cross multiply
    11,311.80x = 15,618.37 × 7,543.85
  4. Step 4: Simplify right side
    11,311.80x = 117,822,640.52
  5. Step 5: Solve for x
    x = 117,822,640.52/11,311.80
  6. Step 6: Final answer
    x = 10,415.91

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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.