Home / 20,716.98-28,589.61-11,285.55

Finding the Fourth Proportional to 20,716.98, 28,589.61 and 11,285.55

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Solution

The fourth proportional to 20,716.98, 28,589.61 and 11,285.55 is: 15,574.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.98 : 28,589.61 = 11,285.55 : x
  2. Step 2: Convert to fraction form
    20,716.98/28,589.61 = 11,285.55/x
  3. Step 3: Cross multiply
    20,716.98x = 28,589.61 × 11,285.55
  4. Step 4: Simplify right side
    20,716.98x = 322,649,473.14
  5. Step 5: Solve for x
    x = 322,649,473.14/20,716.98
  6. Step 6: Final answer
    x = 15,574.16

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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.