Home / 21,221.79-31,805.01-8,727.54

Finding the Fourth Proportional to 21,221.79, 31,805.01 and 8,727.54

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Solution

The fourth proportional to 21,221.79, 31,805.01 and 8,727.54 is: 13,079.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.79 : 31,805.01 = 8,727.54 : x
  2. Step 2: Convert to fraction form
    21,221.79/31,805.01 = 8,727.54/x
  3. Step 3: Cross multiply
    21,221.79x = 31,805.01 × 8,727.54
  4. Step 4: Simplify right side
    21,221.79x = 277,579,496.98
  5. Step 5: Solve for x
    x = 277,579,496.98/21,221.79
  6. Step 6: Final answer
    x = 13,079.93

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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.