Home / 7,421.22-11,109.96-4,129.79

Finding the Fourth Proportional to 7,421.22, 11,109.96 and 4,129.79

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Solution

The fourth proportional to 7,421.22, 11,109.96 and 4,129.79 is: 6,182.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.22 : 11,109.96 = 4,129.79 : x
  2. Step 2: Convert to fraction form
    7,421.22/11,109.96 = 4,129.79/x
  3. Step 3: Cross multiply
    7,421.22x = 11,109.96 × 4,129.79
  4. Step 4: Simplify right side
    7,421.22x = 45,881,746.16
  5. Step 5: Solve for x
    x = 45,881,746.16/7,421.22
  6. Step 6: Final answer
    x = 6,182.51

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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.