Home / 15,942.89-21,908.84-15,211.16

Finding the Fourth Proportional to 15,942.89, 21,908.84 and 15,211.16

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Solution

The fourth proportional to 15,942.89, 21,908.84 and 15,211.16 is: 20,903.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,942.89 : 21,908.84 = 15,211.16 : x
  2. Step 2: Convert to fraction form
    15,942.89/21,908.84 = 15,211.16/x
  3. Step 3: Cross multiply
    15,942.89x = 21,908.84 × 15,211.16
  4. Step 4: Simplify right side
    15,942.89x = 333,258,799.14
  5. Step 5: Solve for x
    x = 333,258,799.14/15,942.89
  6. Step 6: Final answer
    x = 20,903.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.