Home / 6,429.20-9,643.79-1,812.20

Finding the Fourth Proportional to 6,429.20, 9,643.79 and 1,812.20

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Solution

The fourth proportional to 6,429.20, 9,643.79 and 1,812.20 is: 2,718.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.20 : 9,643.79 = 1,812.20 : x
  2. Step 2: Convert to fraction form
    6,429.20/9,643.79 = 1,812.20/x
  3. Step 3: Cross multiply
    6,429.20x = 9,643.79 × 1,812.20
  4. Step 4: Simplify right side
    6,429.20x = 17,476,418.96
  5. Step 5: Solve for x
    x = 17,476,418.96/6,429.20
  6. Step 6: Final answer
    x = 2,718.29

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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.