Home / 21,149.82-31,729.62-7,111.74

Finding the Fourth Proportional to 21,149.82, 31,729.62 and 7,111.74

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Solution

The fourth proportional to 21,149.82, 31,729.62 and 7,111.74 is: 10,669.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.82 : 31,729.62 = 7,111.74 : x
  2. Step 2: Convert to fraction form
    21,149.82/31,729.62 = 7,111.74/x
  3. Step 3: Cross multiply
    21,149.82x = 31,729.62 × 7,111.74
  4. Step 4: Simplify right side
    21,149.82x = 225,652,807.74
  5. Step 5: Solve for x
    x = 225,652,807.74/21,149.82
  6. Step 6: Final answer
    x = 10,669.25

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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.