Home / 12,209.20-18,313.80-7,288.45

Finding the Fourth Proportional to 12,209.20, 18,313.80 and 7,288.45

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Solution

The fourth proportional to 12,209.20, 18,313.80 and 7,288.45 is: 10,932.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.20 : 18,313.80 = 7,288.45 : x
  2. Step 2: Convert to fraction form
    12,209.20/18,313.80 = 7,288.45/x
  3. Step 3: Cross multiply
    12,209.20x = 18,313.80 × 7,288.45
  4. Step 4: Simplify right side
    12,209.20x = 133,479,215.61
  5. Step 5: Solve for x
    x = 133,479,215.61/12,209.20
  6. Step 6: Final answer
    x = 10,932.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.