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Finding the Fourth Proportional to 18,787.87, 25,915.53 and 12,082.24

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Solution

The fourth proportional to 18,787.87, 25,915.53 and 12,082.24 is: 16,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.87 : 25,915.53 = 12,082.24 : x
  2. Step 2: Convert to fraction form
    18,787.87/25,915.53 = 12,082.24/x
  3. Step 3: Cross multiply
    18,787.87x = 25,915.53 × 12,082.24
  4. Step 4: Simplify right side
    18,787.87x = 313,117,653.19
  5. Step 5: Solve for x
    x = 313,117,653.19/18,787.87
  6. Step 6: Final answer
    x = 16,665.95

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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.