Home / 18,639.75-25,719.35-11,087.91

Finding the Fourth Proportional to 18,639.75, 25,719.35 and 11,087.91

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Solution

The fourth proportional to 18,639.75, 25,719.35 and 11,087.91 is: 15,299.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.75 : 25,719.35 = 11,087.91 : x
  2. Step 2: Convert to fraction form
    18,639.75/25,719.35 = 11,087.91/x
  3. Step 3: Cross multiply
    18,639.75x = 25,719.35 × 11,087.91
  4. Step 4: Simplify right side
    18,639.75x = 285,173,838.06
  5. Step 5: Solve for x
    x = 285,173,838.06/18,639.75
  6. Step 6: Final answer
    x = 15,299.23

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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.