Home / 7,421.12-11,132.76-2,421.86

Finding the Fourth Proportional to 7,421.12, 11,132.76 and 2,421.86

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Solution

The fourth proportional to 7,421.12, 11,132.76 and 2,421.86 is: 3,633.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.12 : 11,132.76 = 2,421.86 : x
  2. Step 2: Convert to fraction form
    7,421.12/11,132.76 = 2,421.86/x
  3. Step 3: Cross multiply
    7,421.12x = 11,132.76 × 2,421.86
  4. Step 4: Simplify right side
    7,421.12x = 26,961,930.47
  5. Step 5: Solve for x
    x = 26,961,930.47/7,421.12
  6. Step 6: Final answer
    x = 3,633.14

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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.