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Finding the Fourth Proportional to 15,882.44, 21,910.58 and 9,915.58

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Solution

The fourth proportional to 15,882.44, 21,910.58 and 9,915.58 is: 13,679.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.44 : 21,910.58 = 9,915.58 : x
  2. Step 2: Convert to fraction form
    15,882.44/21,910.58 = 9,915.58/x
  3. Step 3: Cross multiply
    15,882.44x = 21,910.58 × 9,915.58
  4. Step 4: Simplify right side
    15,882.44x = 217,256,108.84
  5. Step 5: Solve for x
    x = 217,256,108.84/15,882.44
  6. Step 6: Final answer
    x = 13,679.01

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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.