Home / 7,421.40-11,128.82-2,226.28

Finding the Fourth Proportional to 7,421.40, 11,128.82 and 2,226.28

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Solution

The fourth proportional to 7,421.40, 11,128.82 and 2,226.28 is: 3,338.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.40 : 11,128.82 = 2,226.28 : x
  2. Step 2: Convert to fraction form
    7,421.40/11,128.82 = 2,226.28/x
  3. Step 3: Cross multiply
    7,421.40x = 11,128.82 × 2,226.28
  4. Step 4: Simplify right side
    7,421.40x = 24,775,869.39
  5. Step 5: Solve for x
    x = 24,775,869.39/7,421.40
  6. Step 6: Final answer
    x = 3,338.44

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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.