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Finding the Fourth Proportional to 7,876.68, 11,810.91 and 3,715.57

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Solution

The fourth proportional to 7,876.68, 11,810.91 and 3,715.57 is: 5,571.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.68 : 11,810.91 = 3,715.57 : x
  2. Step 2: Convert to fraction form
    7,876.68/11,810.91 = 3,715.57/x
  3. Step 3: Cross multiply
    7,876.68x = 11,810.91 × 3,715.57
  4. Step 4: Simplify right side
    7,876.68x = 43,884,203.81
  5. Step 5: Solve for x
    x = 43,884,203.81/7,876.68
  6. Step 6: Final answer
    x = 5,571.41

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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.