Home / 21,106.54-31,631.90-11,090.82

Finding the Fourth Proportional to 21,106.54, 31,631.90 and 11,090.82

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Solution

The fourth proportional to 21,106.54, 31,631.90 and 11,090.82 is: 16,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.54 : 31,631.90 = 11,090.82 : x
  2. Step 2: Convert to fraction form
    21,106.54/31,631.90 = 11,090.82/x
  3. Step 3: Cross multiply
    21,106.54x = 31,631.90 × 11,090.82
  4. Step 4: Simplify right side
    21,106.54x = 350,823,736.89
  5. Step 5: Solve for x
    x = 350,823,736.89/21,106.54
  6. Step 6: Final answer
    x = 16,621.57

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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.