Home / 12,619.40-18,929.10-11,755.40

Finding the Fourth Proportional to 12,619.40, 18,929.10 and 11,755.40

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Solution

The fourth proportional to 12,619.40, 18,929.10 and 11,755.40 is: 17,633.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.40 : 18,929.10 = 11,755.40 : x
  2. Step 2: Convert to fraction form
    12,619.40/18,929.10 = 11,755.40/x
  3. Step 3: Cross multiply
    12,619.40x = 18,929.10 × 11,755.40
  4. Step 4: Simplify right side
    12,619.40x = 222,519,142.14
  5. Step 5: Solve for x
    x = 222,519,142.14/12,619.40
  6. Step 6: Final answer
    x = 17,633.10

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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.