Home / 12,249.20-16,900.80-7,211.60

Finding the Fourth Proportional to 12,249.20, 16,900.80 and 7,211.60

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Solution

The fourth proportional to 12,249.20, 16,900.80 and 7,211.60 is: 9,950.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,249.20 : 16,900.80 = 7,211.60 : x
  2. Step 2: Convert to fraction form
    12,249.20/16,900.80 = 7,211.60/x
  3. Step 3: Cross multiply
    12,249.20x = 16,900.80 × 7,211.60
  4. Step 4: Simplify right side
    12,249.20x = 121,881,809.28
  5. Step 5: Solve for x
    x = 121,881,809.28/12,249.20
  6. Step 6: Final answer
    x = 9,950.19

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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.