Home / 21,086.80-31,643.34-7,937.44

Finding the Fourth Proportional to 21,086.80, 31,643.34 and 7,937.44

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Solution

The fourth proportional to 21,086.80, 31,643.34 and 7,937.44 is: 11,911.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.80 : 31,643.34 = 7,937.44 : x
  2. Step 2: Convert to fraction form
    21,086.80/31,643.34 = 7,937.44/x
  3. Step 3: Cross multiply
    21,086.80x = 31,643.34 × 7,937.44
  4. Step 4: Simplify right side
    21,086.80x = 251,167,112.65
  5. Step 5: Solve for x
    x = 251,167,112.65/21,086.80
  6. Step 6: Final answer
    x = 11,911.11

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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.