Home / 12,619.12-18,768.59-12,356.68

Finding the Fourth Proportional to 12,619.12, 18,768.59 and 12,356.68

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Solution

The fourth proportional to 12,619.12, 18,768.59 and 12,356.68 is: 18,378.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.12 : 18,768.59 = 12,356.68 : x
  2. Step 2: Convert to fraction form
    12,619.12/18,768.59 = 12,356.68/x
  3. Step 3: Cross multiply
    12,619.12x = 18,768.59 × 12,356.68
  4. Step 4: Simplify right side
    12,619.12x = 231,917,460.68
  5. Step 5: Solve for x
    x = 231,917,460.68/12,619.12
  6. Step 6: Final answer
    x = 18,378.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.