Home / 12,643.12-18,965.58-3,878.20

Finding the Fourth Proportional to 12,643.12, 18,965.58 and 3,878.20

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Solution

The fourth proportional to 12,643.12, 18,965.58 and 3,878.20 is: 5,817.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.12 : 18,965.58 = 3,878.20 : x
  2. Step 2: Convert to fraction form
    12,643.12/18,965.58 = 3,878.20/x
  3. Step 3: Cross multiply
    12,643.12x = 18,965.58 × 3,878.20
  4. Step 4: Simplify right side
    12,643.12x = 73,552,312.36
  5. Step 5: Solve for x
    x = 73,552,312.36/12,643.12
  6. Step 6: Final answer
    x = 5,817.58

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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.