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Finding the Fourth Proportional to 15,915.78, 21,963.72 and 8,842.86

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Solution

The fourth proportional to 15,915.78, 21,963.72 and 8,842.86 is: 12,203.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,915.78 : 21,963.72 = 8,842.86 : x
  2. Step 2: Convert to fraction form
    15,915.78/21,963.72 = 8,842.86/x
  3. Step 3: Cross multiply
    15,915.78x = 21,963.72 × 8,842.86
  4. Step 4: Simplify right side
    15,915.78x = 194,222,101.04
  5. Step 5: Solve for x
    x = 194,222,101.04/15,915.78
  6. Step 6: Final answer
    x = 12,203.12

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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.