Home / 13,221.72-18,244.68-7,916.44

Finding the Fourth Proportional to 13,221.72, 18,244.68 and 7,916.44

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Solution

The fourth proportional to 13,221.72, 18,244.68 and 7,916.44 is: 10,923.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.72 : 18,244.68 = 7,916.44 : x
  2. Step 2: Convert to fraction form
    13,221.72/18,244.68 = 7,916.44/x
  3. Step 3: Cross multiply
    13,221.72x = 18,244.68 × 7,916.44
  4. Step 4: Simplify right side
    13,221.72x = 144,432,914.54
  5. Step 5: Solve for x
    x = 144,432,914.54/13,221.72
  6. Step 6: Final answer
    x = 10,923.91

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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.