Home / 19,287.56-28,918.62-12,693.80

Finding the Fourth Proportional to 19,287.56, 28,918.62 and 12,693.80

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Solution

The fourth proportional to 19,287.56, 28,918.62 and 12,693.80 is: 19,032.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.56 : 28,918.62 = 12,693.80 : x
  2. Step 2: Convert to fraction form
    19,287.56/28,918.62 = 12,693.80/x
  3. Step 3: Cross multiply
    19,287.56x = 28,918.62 × 12,693.80
  4. Step 4: Simplify right side
    19,287.56x = 367,087,178.56
  5. Step 5: Solve for x
    x = 367,087,178.56/19,287.56
  6. Step 6: Final answer
    x = 19,032.33

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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.