Home / 12,121.56-16,707.20-9,249.30

Finding the Fourth Proportional to 12,121.56, 16,707.20 and 9,249.30

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Solution

The fourth proportional to 12,121.56, 16,707.20 and 9,249.30 is: 12,748.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.56 : 16,707.20 = 9,249.30 : x
  2. Step 2: Convert to fraction form
    12,121.56/16,707.20 = 9,249.30/x
  3. Step 3: Cross multiply
    12,121.56x = 16,707.20 × 9,249.30
  4. Step 4: Simplify right side
    12,121.56x = 154,529,858.71
  5. Step 5: Solve for x
    x = 154,529,858.71/12,121.56
  6. Step 6: Final answer
    x = 12,748.35

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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.