Home / 12,891.40-17,789.58-7,226.68

Finding the Fourth Proportional to 12,891.40, 17,789.58 and 7,226.68

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Solution

The fourth proportional to 12,891.40, 17,789.58 and 7,226.68 is: 9,972.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.40 : 17,789.58 = 7,226.68 : x
  2. Step 2: Convert to fraction form
    12,891.40/17,789.58 = 7,226.68/x
  3. Step 3: Cross multiply
    12,891.40x = 17,789.58 × 7,226.68
  4. Step 4: Simplify right side
    12,891.40x = 128,559,601.99
  5. Step 5: Solve for x
    x = 128,559,601.99/12,891.40
  6. Step 6: Final answer
    x = 9,972.51

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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.