Home / 8,915.35-13,372.81-5,172.72

Finding the Fourth Proportional to 8,915.35, 13,372.81 and 5,172.72

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Solution

The fourth proportional to 8,915.35, 13,372.81 and 5,172.72 is: 7,758.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.35 : 13,372.81 = 5,172.72 : x
  2. Step 2: Convert to fraction form
    8,915.35/13,372.81 = 5,172.72/x
  3. Step 3: Cross multiply
    8,915.35x = 13,372.81 × 5,172.72
  4. Step 4: Simplify right side
    8,915.35x = 69,173,801.74
  5. Step 5: Solve for x
    x = 69,173,801.74/8,915.35
  6. Step 6: Final answer
    x = 7,758.96

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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.