Home / 18,639.87-25,724.84-13,915.95

Finding the Fourth Proportional to 18,639.87, 25,724.84 and 13,915.95

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Solution

The fourth proportional to 18,639.87, 25,724.84 and 13,915.95 is: 19,205.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.87 : 25,724.84 = 13,915.95 : x
  2. Step 2: Convert to fraction form
    18,639.87/25,724.84 = 13,915.95/x
  3. Step 3: Cross multiply
    18,639.87x = 25,724.84 × 13,915.95
  4. Step 4: Simplify right side
    18,639.87x = 357,985,517.62
  5. Step 5: Solve for x
    x = 357,985,517.62/18,639.87
  6. Step 6: Final answer
    x = 19,205.37

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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.