Home / 21,256.43-31,870.22-11,902.88

Finding the Fourth Proportional to 21,256.43, 31,870.22 and 11,902.88

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Solution

The fourth proportional to 21,256.43, 31,870.22 and 11,902.88 is: 17,846.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.43 : 31,870.22 = 11,902.88 : x
  2. Step 2: Convert to fraction form
    21,256.43/31,870.22 = 11,902.88/x
  3. Step 3: Cross multiply
    21,256.43x = 31,870.22 × 11,902.88
  4. Step 4: Simplify right side
    21,256.43x = 379,347,344.72
  5. Step 5: Solve for x
    x = 379,347,344.72/21,256.43
  6. Step 6: Final answer
    x = 17,846.24

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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.