Home / 7,403.40-11,115.90-5,221.80

Finding the Fourth Proportional to 7,403.40, 11,115.90 and 5,221.80

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Solution

The fourth proportional to 7,403.40, 11,115.90 and 5,221.80 is: 7,840.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,403.40 : 11,115.90 = 5,221.80 : x
  2. Step 2: Convert to fraction form
    7,403.40/11,115.90 = 5,221.80/x
  3. Step 3: Cross multiply
    7,403.40x = 11,115.90 × 5,221.80
  4. Step 4: Simplify right side
    7,403.40x = 58,045,006.62
  5. Step 5: Solve for x
    x = 58,045,006.62/7,403.40
  6. Step 6: Final answer
    x = 7,840.32

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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.