Home / 21,130.04-31,672.62-7,976.84

Finding the Fourth Proportional to 21,130.04, 31,672.62 and 7,976.84

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Solution

The fourth proportional to 21,130.04, 31,672.62 and 7,976.84 is: 11,956.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.04 : 31,672.62 = 7,976.84 : x
  2. Step 2: Convert to fraction form
    21,130.04/31,672.62 = 7,976.84/x
  3. Step 3: Cross multiply
    21,130.04x = 31,672.62 × 7,976.84
  4. Step 4: Simplify right side
    21,130.04x = 252,647,422.12
  5. Step 5: Solve for x
    x = 252,647,422.12/21,130.04
  6. Step 6: Final answer
    x = 11,956.79

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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.