Home / 10,141.80-13,941.96-8,720.28

Finding the Fourth Proportional to 10,141.80, 13,941.96 and 8,720.28

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Solution

The fourth proportional to 10,141.80, 13,941.96 and 8,720.28 is: 11,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,141.80 : 13,941.96 = 8,720.28 : x
  2. Step 2: Convert to fraction form
    10,141.80/13,941.96 = 8,720.28/x
  3. Step 3: Cross multiply
    10,141.80x = 13,941.96 × 8,720.28
  4. Step 4: Simplify right side
    10,141.80x = 121,577,794.95
  5. Step 5: Solve for x
    x = 121,577,794.95/10,141.80
  6. Step 6: Final answer
    x = 11,987.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.