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Finding the Fourth Proportional to 16,915.64, 25,388.90 and 8,601.40

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Solution

The fourth proportional to 16,915.64, 25,388.90 and 8,601.40 is: 12,909.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,915.64 : 25,388.90 = 8,601.40 : x
  2. Step 2: Convert to fraction form
    16,915.64/25,388.90 = 8,601.40/x
  3. Step 3: Cross multiply
    16,915.64x = 25,388.90 × 8,601.40
  4. Step 4: Simplify right side
    16,915.64x = 218,380,084.46
  5. Step 5: Solve for x
    x = 218,380,084.46/16,915.64
  6. Step 6: Final answer
    x = 12,909.95

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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.