Home / 21,220.61-31,808.72-11,846.88

Finding the Fourth Proportional to 21,220.61, 31,808.72 and 11,846.88

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Solution

The fourth proportional to 21,220.61, 31,808.72 and 11,846.88 is: 17,757.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.61 : 31,808.72 = 11,846.88 : x
  2. Step 2: Convert to fraction form
    21,220.61/31,808.72 = 11,846.88/x
  3. Step 3: Cross multiply
    21,220.61x = 31,808.72 × 11,846.88
  4. Step 4: Simplify right side
    21,220.61x = 376,834,029.56
  5. Step 5: Solve for x
    x = 376,834,029.56/21,220.61
  6. Step 6: Final answer
    x = 17,757.93

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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.