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Finding the Fourth Proportional to 7,915.72, 11,870.11 and 3,756.93

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Solution

The fourth proportional to 7,915.72, 11,870.11 and 3,756.93 is: 5,633.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.72 : 11,870.11 = 3,756.93 : x
  2. Step 2: Convert to fraction form
    7,915.72/11,870.11 = 3,756.93/x
  3. Step 3: Cross multiply
    7,915.72x = 11,870.11 × 3,756.93
  4. Step 4: Simplify right side
    7,915.72x = 44,595,172.36
  5. Step 5: Solve for x
    x = 44,595,172.36/7,915.72
  6. Step 6: Final answer
    x = 5,633.75

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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.