Home / 18,949.90-28,428.27-7,857.48

Finding the Fourth Proportional to 18,949.90, 28,428.27 and 7,857.48

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Solution

The fourth proportional to 18,949.90, 28,428.27 and 7,857.48 is: 11,787.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,949.90 : 28,428.27 = 7,857.48 : x
  2. Step 2: Convert to fraction form
    18,949.90/28,428.27 = 7,857.48/x
  3. Step 3: Cross multiply
    18,949.90x = 28,428.27 × 7,857.48
  4. Step 4: Simplify right side
    18,949.90x = 223,374,560.15
  5. Step 5: Solve for x
    x = 223,374,560.15/18,949.90
  6. Step 6: Final answer
    x = 11,787.64

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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.