Home / 13,755.56-18,982.89-7,787.07

Finding the Fourth Proportional to 13,755.56, 18,982.89 and 7,787.07

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Solution

The fourth proportional to 13,755.56, 18,982.89 and 7,787.07 is: 10,746.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.56 : 18,982.89 = 7,787.07 : x
  2. Step 2: Convert to fraction form
    13,755.56/18,982.89 = 7,787.07/x
  3. Step 3: Cross multiply
    13,755.56x = 18,982.89 × 7,787.07
  4. Step 4: Simplify right side
    13,755.56x = 147,821,093.23
  5. Step 5: Solve for x
    x = 147,821,093.23/13,755.56
  6. Step 6: Final answer
    x = 10,746.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.