Home / 12,469.09-18,708.42-8,915.21

Finding the Fourth Proportional to 12,469.09, 18,708.42 and 8,915.21

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Solution

The fourth proportional to 12,469.09, 18,708.42 and 8,915.21 is: 13,376.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.09 : 18,708.42 = 8,915.21 : x
  2. Step 2: Convert to fraction form
    12,469.09/18,708.42 = 8,915.21/x
  3. Step 3: Cross multiply
    12,469.09x = 18,708.42 × 8,915.21
  4. Step 4: Simplify right side
    12,469.09x = 166,789,558.20
  5. Step 5: Solve for x
    x = 166,789,558.20/12,469.09
  6. Step 6: Final answer
    x = 13,376.24

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1.5x scale

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.