Home / 13,759.22-18,995.78-9,978.75

Finding the Fourth Proportional to 13,759.22, 18,995.78 and 9,978.75

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Solution

The fourth proportional to 13,759.22, 18,995.78 and 9,978.75 is: 13,776.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.22 : 18,995.78 = 9,978.75 : x
  2. Step 2: Convert to fraction form
    13,759.22/18,995.78 = 9,978.75/x
  3. Step 3: Cross multiply
    13,759.22x = 18,995.78 × 9,978.75
  4. Step 4: Simplify right side
    13,759.22x = 189,554,164.62
  5. Step 5: Solve for x
    x = 189,554,164.62/13,759.22
  6. Step 6: Final answer
    x = 13,776.52

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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.