Home / 7,390.20-11,085.30-5,421.90

Finding the Fourth Proportional to 7,390.20, 11,085.30 and 5,421.90

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Solution

The fourth proportional to 7,390.20, 11,085.30 and 5,421.90 is: 8,132.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390.20 : 11,085.30 = 5,421.90 : x
  2. Step 2: Convert to fraction form
    7,390.20/11,085.30 = 5,421.90/x
  3. Step 3: Cross multiply
    7,390.20x = 11,085.30 × 5,421.90
  4. Step 4: Simplify right side
    7,390.20x = 60,103,388.07
  5. Step 5: Solve for x
    x = 60,103,388.07/7,390.20
  6. Step 6: Final answer
    x = 8,132.85

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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.