Home / 7,421.13-11,126.43-3,720.69

Finding the Fourth Proportional to 7,421.13, 11,126.43 and 3,720.69

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Solution

The fourth proportional to 7,421.13, 11,126.43 and 3,720.69 is: 5,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.13 : 11,126.43 = 3,720.69 : x
  2. Step 2: Convert to fraction form
    7,421.13/11,126.43 = 3,720.69/x
  3. Step 3: Cross multiply
    7,421.13x = 11,126.43 × 3,720.69
  4. Step 4: Simplify right side
    7,421.13x = 41,397,996.84
  5. Step 5: Solve for x
    x = 41,397,996.84/7,421.13
  6. Step 6: Final answer
    x = 5,578.40

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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.