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Finding the Fourth Proportional to 7,721.19, 11,595.83 and 7,407.99

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Solution

The fourth proportional to 7,721.19, 11,595.83 and 7,407.99 is: 11,125.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.19 : 11,595.83 = 7,407.99 : x
  2. Step 2: Convert to fraction form
    7,721.19/11,595.83 = 7,407.99/x
  3. Step 3: Cross multiply
    7,721.19x = 11,595.83 × 7,407.99
  4. Step 4: Simplify right side
    7,721.19x = 85,901,755.64
  5. Step 5: Solve for x
    x = 85,901,755.64/7,721.19
  6. Step 6: Final answer
    x = 11,125.46

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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.