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Finding the Fourth Proportional to 15,878.52, 21,912.48 and 8,804.88

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Solution

The fourth proportional to 15,878.52, 21,912.48 and 8,804.88 is: 12,150.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878.52 : 21,912.48 = 8,804.88 : x
  2. Step 2: Convert to fraction form
    15,878.52/21,912.48 = 8,804.88/x
  3. Step 3: Cross multiply
    15,878.52x = 21,912.48 × 8,804.88
  4. Step 4: Simplify right side
    15,878.52x = 192,936,756.90
  5. Step 5: Solve for x
    x = 192,936,756.90/15,878.52
  6. Step 6: Final answer
    x = 12,150.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.