Home / 7,221.15-10,821.60-5,742.90

Finding the Fourth Proportional to 7,221.15, 10,821.60 and 5,742.90

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Solution

The fourth proportional to 7,221.15, 10,821.60 and 5,742.90 is: 8,606.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.15 : 10,821.60 = 5,742.90 : x
  2. Step 2: Convert to fraction form
    7,221.15/10,821.60 = 5,742.90/x
  3. Step 3: Cross multiply
    7,221.15x = 10,821.60 × 5,742.90
  4. Step 4: Simplify right side
    7,221.15x = 62,147,366.64
  5. Step 5: Solve for x
    x = 62,147,366.64/7,221.15
  6. Step 6: Final answer
    x = 8,606.30

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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.