Home / 21,915.28-30,243.09-11,843.72

Finding the Fourth Proportional to 21,915.28, 30,243.09 and 11,843.72

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Solution

The fourth proportional to 21,915.28, 30,243.09 and 11,843.72 is: 16,344.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.28 : 30,243.09 = 11,843.72 : x
  2. Step 2: Convert to fraction form
    21,915.28/30,243.09 = 11,843.72/x
  3. Step 3: Cross multiply
    21,915.28x = 30,243.09 × 11,843.72
  4. Step 4: Simplify right side
    21,915.28x = 358,190,689.89
  5. Step 5: Solve for x
    x = 358,190,689.89/21,915.28
  6. Step 6: Final answer
    x = 16,344.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.