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Finding the Fourth Proportional to 15,891.02, 23,811.17 and 12,915.05

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Solution

The fourth proportional to 15,891.02, 23,811.17 and 12,915.05 is: 19,351.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.02 : 23,811.17 = 12,915.05 : x
  2. Step 2: Convert to fraction form
    15,891.02/23,811.17 = 12,915.05/x
  3. Step 3: Cross multiply
    15,891.02x = 23,811.17 × 12,915.05
  4. Step 4: Simplify right side
    15,891.02x = 307,522,267.48
  5. Step 5: Solve for x
    x = 307,522,267.48/15,891.02
  6. Step 6: Final answer
    x = 19,351.95

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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.