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Finding the Fourth Proportional to 7,421.08, 11,131.08 and 3,719.56

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Solution

The fourth proportional to 7,421.08, 11,131.08 and 3,719.56 is: 5,579.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.08 : 11,131.08 = 3,719.56 : x
  2. Step 2: Convert to fraction form
    7,421.08/11,131.08 = 3,719.56/x
  3. Step 3: Cross multiply
    7,421.08x = 11,131.08 × 3,719.56
  4. Step 4: Simplify right side
    7,421.08x = 41,402,719.92
  5. Step 5: Solve for x
    x = 41,402,719.92/7,421.08
  6. Step 6: Final answer
    x = 5,579.07

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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.