Home / 21,150.75-31,726.64-7,110.96

Finding the Fourth Proportional to 21,150.75, 31,726.64 and 7,110.96

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Solution

The fourth proportional to 21,150.75, 31,726.64 and 7,110.96 is: 10,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.75 : 31,726.64 = 7,110.96 : x
  2. Step 2: Convert to fraction form
    21,150.75/31,726.64 = 7,110.96/x
  3. Step 3: Cross multiply
    21,150.75x = 31,726.64 × 7,110.96
  4. Step 4: Simplify right side
    21,150.75x = 225,606,832.42
  5. Step 5: Solve for x
    x = 225,606,832.42/21,150.75
  6. Step 6: Final answer
    x = 10,666.61

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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.