Home / 10,638.24-15,942.76-5,433.20

Finding the Fourth Proportional to 10,638.24, 15,942.76 and 5,433.20

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Solution

The fourth proportional to 10,638.24, 15,942.76 and 5,433.20 is: 8,142.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,638.24 : 15,942.76 = 5,433.20 : x
  2. Step 2: Convert to fraction form
    10,638.24/15,942.76 = 5,433.20/x
  3. Step 3: Cross multiply
    10,638.24x = 15,942.76 × 5,433.20
  4. Step 4: Simplify right side
    10,638.24x = 86,620,203.63
  5. Step 5: Solve for x
    x = 86,620,203.63/10,638.24
  6. Step 6: Final answer
    x = 8,142.34

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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.