Home / 7,421.40-11,128.32-2,226.60

Finding the Fourth Proportional to 7,421.40, 11,128.32 and 2,226.60

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Solution

The fourth proportional to 7,421.40, 11,128.32 and 2,226.60 is: 3,338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.40 : 11,128.32 = 2,226.60 : x
  2. Step 2: Convert to fraction form
    7,421.40/11,128.32 = 2,226.60/x
  3. Step 3: Cross multiply
    7,421.40x = 11,128.32 × 2,226.60
  4. Step 4: Simplify right side
    7,421.40x = 24,778,317.31
  5. Step 5: Solve for x
    x = 24,778,317.31/7,421.40
  6. Step 6: Final answer
    x = 3,338.77

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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.