Home / 18,921.88-28,395.99-7,828.62

Finding the Fourth Proportional to 18,921.88, 28,395.99 and 7,828.62

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Solution

The fourth proportional to 18,921.88, 28,395.99 and 7,828.62 is: 11,748.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.88 : 28,395.99 = 7,828.62 : x
  2. Step 2: Convert to fraction form
    18,921.88/28,395.99 = 7,828.62/x
  3. Step 3: Cross multiply
    18,921.88x = 28,395.99 × 7,828.62
  4. Step 4: Simplify right side
    18,921.88x = 222,301,570.36
  5. Step 5: Solve for x
    x = 222,301,570.36/18,921.88
  6. Step 6: Final answer
    x = 11,748.39

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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.