Home / 12,640.36-18,962.79-4,321.30

Finding the Fourth Proportional to 12,640.36, 18,962.79 and 4,321.30

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Solution

The fourth proportional to 12,640.36, 18,962.79 and 4,321.30 is: 6,482.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.36 : 18,962.79 = 4,321.30 : x
  2. Step 2: Convert to fraction form
    12,640.36/18,962.79 = 4,321.30/x
  3. Step 3: Cross multiply
    12,640.36x = 18,962.79 × 4,321.30
  4. Step 4: Simplify right side
    12,640.36x = 81,943,904.43
  5. Step 5: Solve for x
    x = 81,943,904.43/12,640.36
  6. Step 6: Final answer
    x = 6,482.72

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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.