Home / 7,421.20-11,131.42-2,490.88

Finding the Fourth Proportional to 7,421.20, 11,131.42 and 2,490.88

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Solution

The fourth proportional to 7,421.20, 11,131.42 and 2,490.88 is: 3,736.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.20 : 11,131.42 = 2,490.88 : x
  2. Step 2: Convert to fraction form
    7,421.20/11,131.42 = 2,490.88/x
  3. Step 3: Cross multiply
    7,421.20x = 11,131.42 × 2,490.88
  4. Step 4: Simplify right side
    7,421.20x = 27,727,031.45
  5. Step 5: Solve for x
    x = 27,727,031.45/7,421.20
  6. Step 6: Final answer
    x = 3,736.19

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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.