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Finding the Fourth Proportional to 15,915.75, 21,963.75 and 8,842.83

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Solution

The fourth proportional to 15,915.75, 21,963.75 and 8,842.83 is: 12,203.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,915.75 : 21,963.75 = 8,842.83 : x
  2. Step 2: Convert to fraction form
    15,915.75/21,963.75 = 8,842.83/x
  3. Step 3: Cross multiply
    15,915.75x = 21,963.75 × 8,842.83
  4. Step 4: Simplify right side
    15,915.75x = 194,221,707.41
  5. Step 5: Solve for x
    x = 194,221,707.41/15,915.75
  6. Step 6: Final answer
    x = 12,203.11

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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.