Home / 13,889.89-20,815.39-9,975.97

Finding the Fourth Proportional to 13,889.89, 20,815.39 and 9,975.97

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Solution

The fourth proportional to 13,889.89, 20,815.39 and 9,975.97 is: 14,949.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.89 : 20,815.39 = 9,975.97 : x
  2. Step 2: Convert to fraction form
    13,889.89/20,815.39 = 9,975.97/x
  3. Step 3: Cross multiply
    13,889.89x = 20,815.39 × 9,975.97
  4. Step 4: Simplify right side
    13,889.89x = 207,653,706.18
  5. Step 5: Solve for x
    x = 207,653,706.18/13,889.89
  6. Step 6: Final answer
    x = 14,949.99

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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.