Home / 13,664.17-18,942.55-12,915.80

Finding the Fourth Proportional to 13,664.17, 18,942.55 and 12,915.80

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Solution

The fourth proportional to 13,664.17, 18,942.55 and 12,915.80 is: 17,905.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.17 : 18,942.55 = 12,915.80 : x
  2. Step 2: Convert to fraction form
    13,664.17/18,942.55 = 12,915.80/x
  3. Step 3: Cross multiply
    13,664.17x = 18,942.55 × 12,915.80
  4. Step 4: Simplify right side
    13,664.17x = 244,658,202.36
  5. Step 5: Solve for x
    x = 244,658,202.36/13,664.17
  6. Step 6: Final answer
    x = 17,905.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.