Home / 12,840.20-19,260.30-11,112.20

Finding the Fourth Proportional to 12,840.20, 19,260.30 and 11,112.20

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Solution

The fourth proportional to 12,840.20, 19,260.30 and 11,112.20 is: 16,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.20 : 19,260.30 = 11,112.20 : x
  2. Step 2: Convert to fraction form
    12,840.20/19,260.30 = 11,112.20/x
  3. Step 3: Cross multiply
    12,840.20x = 19,260.30 × 11,112.20
  4. Step 4: Simplify right side
    12,840.20x = 214,024,305.66
  5. Step 5: Solve for x
    x = 214,024,305.66/12,840.20
  6. Step 6: Final answer
    x = 16,668.30

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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.