Home / 21,021.44-31,522.40-12,258.88

Finding the Fourth Proportional to 21,021.44, 31,522.40 and 12,258.88

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Solution

The fourth proportional to 21,021.44, 31,522.40 and 12,258.88 is: 18,382.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.44 : 31,522.40 = 12,258.88 : x
  2. Step 2: Convert to fraction form
    21,021.44/31,522.40 = 12,258.88/x
  3. Step 3: Cross multiply
    21,021.44x = 31,522.40 × 12,258.88
  4. Step 4: Simplify right side
    21,021.44x = 386,429,318.91
  5. Step 5: Solve for x
    x = 386,429,318.91/21,021.44
  6. Step 6: Final answer
    x = 18,382.63

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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.