Home / 12,921.88-19,382.44-7,693.08

Finding the Fourth Proportional to 12,921.88, 19,382.44 and 7,693.08

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Solution

The fourth proportional to 12,921.88, 19,382.44 and 7,693.08 is: 11,539.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.88 : 19,382.44 = 7,693.08 : x
  2. Step 2: Convert to fraction form
    12,921.88/19,382.44 = 7,693.08/x
  3. Step 3: Cross multiply
    12,921.88x = 19,382.44 × 7,693.08
  4. Step 4: Simplify right side
    12,921.88x = 149,110,661.52
  5. Step 5: Solve for x
    x = 149,110,661.52/12,921.88
  6. Step 6: Final answer
    x = 11,539.39

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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.