Home / 13,759.08-18,987.38-7,790.64

Finding the Fourth Proportional to 13,759.08, 18,987.38 and 7,790.64

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Solution

The fourth proportional to 13,759.08, 18,987.38 and 7,790.64 is: 10,751.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.08 : 18,987.38 = 7,790.64 : x
  2. Step 2: Convert to fraction form
    13,759.08/18,987.38 = 7,790.64/x
  3. Step 3: Cross multiply
    13,759.08x = 18,987.38 × 7,790.64
  4. Step 4: Simplify right side
    13,759.08x = 147,923,842.12
  5. Step 5: Solve for x
    x = 147,923,842.12/13,759.08
  6. Step 6: Final answer
    x = 10,751.00

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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.