Home / 21,102.54-31,638.12-7,054.28

Finding the Fourth Proportional to 21,102.54, 31,638.12 and 7,054.28

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Solution

The fourth proportional to 21,102.54, 31,638.12 and 7,054.28 is: 10,576.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.54 : 31,638.12 = 7,054.28 : x
  2. Step 2: Convert to fraction form
    21,102.54/31,638.12 = 7,054.28/x
  3. Step 3: Cross multiply
    21,102.54x = 31,638.12 × 7,054.28
  4. Step 4: Simplify right side
    21,102.54x = 223,183,998.96
  5. Step 5: Solve for x
    x = 223,183,998.96/21,102.54
  6. Step 6: Final answer
    x = 10,576.17

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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.