Home / 13,915.35-20,878.31-8,372.52

Finding the Fourth Proportional to 13,915.35, 20,878.31 and 8,372.52

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Solution

The fourth proportional to 13,915.35, 20,878.31 and 8,372.52 is: 12,561.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.35 : 20,878.31 = 8,372.52 : x
  2. Step 2: Convert to fraction form
    13,915.35/20,878.31 = 8,372.52/x
  3. Step 3: Cross multiply
    13,915.35x = 20,878.31 × 8,372.52
  4. Step 4: Simplify right side
    13,915.35x = 174,804,088.97
  5. Step 5: Solve for x
    x = 174,804,088.97/13,915.35
  6. Step 6: Final answer
    x = 12,561.96

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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.