Home / 5,126.88-7,689.48-1,429.36

Finding the Fourth Proportional to 5,126.88, 7,689.48 and 1,429.36

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Solution

The fourth proportional to 5,126.88, 7,689.48 and 1,429.36 is: 2,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.88 : 7,689.48 = 1,429.36 : x
  2. Step 2: Convert to fraction form
    5,126.88/7,689.48 = 1,429.36/x
  3. Step 3: Cross multiply
    5,126.88x = 7,689.48 × 1,429.36
  4. Step 4: Simplify right side
    5,126.88x = 10,991,035.13
  5. Step 5: Solve for x
    x = 10,991,035.13/5,126.88
  6. Step 6: Final answer
    x = 2,143.81

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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.