Home / 19,128.80-28,685.94-7,439.36

Finding the Fourth Proportional to 19,128.80, 28,685.94 and 7,439.36

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Solution

The fourth proportional to 19,128.80, 28,685.94 and 7,439.36 is: 11,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.80 : 28,685.94 = 7,439.36 : x
  2. Step 2: Convert to fraction form
    19,128.80/28,685.94 = 7,439.36/x
  3. Step 3: Cross multiply
    19,128.80x = 28,685.94 × 7,439.36
  4. Step 4: Simplify right side
    19,128.80x = 213,405,034.60
  5. Step 5: Solve for x
    x = 213,405,034.60/19,128.80
  6. Step 6: Final answer
    x = 11,156.22

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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.