Home / 18,873-28,419.57-13,977.36

Finding the Fourth Proportional to 18,873, 28,419.57 and 13,977.36

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Solution

The fourth proportional to 18,873, 28,419.57 and 13,977.36 is: 21,047.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873 : 28,419.57 = 13,977.36 : x
  2. Step 2: Convert to fraction form
    18,873/28,419.57 = 13,977.36/x
  3. Step 3: Cross multiply
    18,873x = 28,419.57 × 13,977.36
  4. Step 4: Simplify right side
    18,873x = 397,230,560.94
  5. Step 5: Solve for x
    x = 397,230,560.94/18,873
  6. Step 6: Final answer
    x = 21,047.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.