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Finding the Fourth Proportional to 7,415.79, 11,124 and 2,221.71

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Solution

The fourth proportional to 7,415.79, 11,124 and 2,221.71 is: 3,332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,415.79 : 11,124 = 2,221.71 : x
  2. Step 2: Convert to fraction form
    7,415.79/11,124 = 2,221.71/x
  3. Step 3: Cross multiply
    7,415.79x = 11,124 × 2,221.71
  4. Step 4: Simplify right side
    7,415.79x = 24,714,302.04
  5. Step 5: Solve for x
    x = 24,714,302.04/7,415.79
  6. Step 6: Final answer
    x = 3,332.66

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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.