Home / 12,643.39-18,964.37-3,878.28

Finding the Fourth Proportional to 12,643.39, 18,964.37 and 3,878.28

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Solution

The fourth proportional to 12,643.39, 18,964.37 and 3,878.28 is: 5,817.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.39 : 18,964.37 = 3,878.28 : x
  2. Step 2: Convert to fraction form
    12,643.39/18,964.37 = 3,878.28/x
  3. Step 3: Cross multiply
    12,643.39x = 18,964.37 × 3,878.28
  4. Step 4: Simplify right side
    12,643.39x = 73,549,136.88
  5. Step 5: Solve for x
    x = 73,549,136.88/12,643.39
  6. Step 6: Final answer
    x = 5,817.20

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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.