Home / 7,421.13-11,131.70-3,314.25

Finding the Fourth Proportional to 7,421.13, 11,131.70 and 3,314.25

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Solution

The fourth proportional to 7,421.13, 11,131.70 and 3,314.25 is: 4,971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.13 : 11,131.70 = 3,314.25 : x
  2. Step 2: Convert to fraction form
    7,421.13/11,131.70 = 3,314.25/x
  3. Step 3: Cross multiply
    7,421.13x = 11,131.70 × 3,314.25
  4. Step 4: Simplify right side
    7,421.13x = 36,893,220.15
  5. Step 5: Solve for x
    x = 36,893,220.15/7,421.13
  6. Step 6: Final answer
    x = 4,971.38

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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.