Home / 15,900.72-21,946.19-9,187.44

Finding the Fourth Proportional to 15,900.72, 21,946.19 and 9,187.44

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Solution

The fourth proportional to 15,900.72, 21,946.19 and 9,187.44 is: 12,680.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.72 : 21,946.19 = 9,187.44 : x
  2. Step 2: Convert to fraction form
    15,900.72/21,946.19 = 9,187.44/x
  3. Step 3: Cross multiply
    15,900.72x = 21,946.19 × 9,187.44
  4. Step 4: Simplify right side
    15,900.72x = 201,629,257.92
  5. Step 5: Solve for x
    x = 201,629,257.92/15,900.72
  6. Step 6: Final answer
    x = 12,680.51

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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.