Home / 18,921.33-28,352.82-11,981.25

Finding the Fourth Proportional to 18,921.33, 28,352.82 and 11,981.25

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Solution

The fourth proportional to 18,921.33, 28,352.82 and 11,981.25 is: 17,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.33 : 28,352.82 = 11,981.25 : x
  2. Step 2: Convert to fraction form
    18,921.33/28,352.82 = 11,981.25/x
  3. Step 3: Cross multiply
    18,921.33x = 28,352.82 × 11,981.25
  4. Step 4: Simplify right side
    18,921.33x = 339,702,224.63
  5. Step 5: Solve for x
    x = 339,702,224.63/18,921.33
  6. Step 6: Final answer
    x = 17,953.40

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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.