Home / 20,756.88-28,643.58-11,805.12

Finding the Fourth Proportional to 20,756.88, 28,643.58 and 11,805.12

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Solution

The fourth proportional to 20,756.88, 28,643.58 and 11,805.12 is: 16,290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.88 : 28,643.58 = 11,805.12 : x
  2. Step 2: Convert to fraction form
    20,756.88/28,643.58 = 11,805.12/x
  3. Step 3: Cross multiply
    20,756.88x = 28,643.58 × 11,805.12
  4. Step 4: Simplify right side
    20,756.88x = 338,140,899.13
  5. Step 5: Solve for x
    x = 338,140,899.13/20,756.88
  6. Step 6: Final answer
    x = 16,290.55

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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.