Home / 13,725.04-18,939.44-7,757.28

Finding the Fourth Proportional to 13,725.04, 18,939.44 and 7,757.28

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Solution

The fourth proportional to 13,725.04, 18,939.44 and 7,757.28 is: 10,704.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.04 : 18,939.44 = 7,757.28 : x
  2. Step 2: Convert to fraction form
    13,725.04/18,939.44 = 7,757.28/x
  3. Step 3: Cross multiply
    13,725.04x = 18,939.44 × 7,757.28
  4. Step 4: Simplify right side
    13,725.04x = 146,918,539.12
  5. Step 5: Solve for x
    x = 146,918,539.12/13,725.04
  6. Step 6: Final answer
    x = 10,704.42

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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.