Home / 13,755.90-18,982.74-7,787.31

Finding the Fourth Proportional to 13,755.90, 18,982.74 and 7,787.31

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Solution

The fourth proportional to 13,755.90, 18,982.74 and 7,787.31 is: 10,746.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.90 : 18,982.74 = 7,787.31 : x
  2. Step 2: Convert to fraction form
    13,755.90/18,982.74 = 7,787.31/x
  3. Step 3: Cross multiply
    13,755.90x = 18,982.74 × 7,787.31
  4. Step 4: Simplify right side
    13,755.90x = 147,824,481.03
  5. Step 5: Solve for x
    x = 147,824,481.03/13,755.90
  6. Step 6: Final answer
    x = 10,746.26

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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.