Home / 19,120.49-28,679.98-6,643.36

Finding the Fourth Proportional to 19,120.49, 28,679.98 and 6,643.36

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Solution

The fourth proportional to 19,120.49, 28,679.98 and 6,643.36 is: 9,964.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.49 : 28,679.98 = 6,643.36 : x
  2. Step 2: Convert to fraction form
    19,120.49/28,679.98 = 6,643.36/x
  3. Step 3: Cross multiply
    19,120.49x = 28,679.98 × 6,643.36
  4. Step 4: Simplify right side
    19,120.49x = 190,531,431.93
  5. Step 5: Solve for x
    x = 190,531,431.93/19,120.49
  6. Step 6: Final answer
    x = 9,964.78

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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.