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Finding the Fourth Proportional to 15,878, 21,912.25 and 8,804.27

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Solution

The fourth proportional to 15,878, 21,912.25 and 8,804.27 is: 12,150.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878 : 21,912.25 = 8,804.27 : x
  2. Step 2: Convert to fraction form
    15,878/21,912.25 = 8,804.27/x
  3. Step 3: Cross multiply
    15,878x = 21,912.25 × 8,804.27
  4. Step 4: Simplify right side
    15,878x = 192,921,365.31
  5. Step 5: Solve for x
    x = 192,921,365.31/15,878
  6. Step 6: Final answer
    x = 12,150.23

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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.