Home / 21,046.62-31,568.77-12,724.40

Finding the Fourth Proportional to 21,046.62, 31,568.77 and 12,724.40

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Solution

The fourth proportional to 21,046.62, 31,568.77 and 12,724.40 is: 19,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,046.62 : 31,568.77 = 12,724.40 : x
  2. Step 2: Convert to fraction form
    21,046.62/31,568.77 = 12,724.40/x
  3. Step 3: Cross multiply
    21,046.62x = 31,568.77 × 12,724.40
  4. Step 4: Simplify right side
    21,046.62x = 401,693,538.45
  5. Step 5: Solve for x
    x = 401,693,538.45/21,046.62
  6. Step 6: Final answer
    x = 19,085.90

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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.