Home / 20,956.59-28,907.42-12,891.60

Finding the Fourth Proportional to 20,956.59, 28,907.42 and 12,891.60

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Solution

The fourth proportional to 20,956.59, 28,907.42 and 12,891.60 is: 17,782.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.59 : 28,907.42 = 12,891.60 : x
  2. Step 2: Convert to fraction form
    20,956.59/28,907.42 = 12,891.60/x
  3. Step 3: Cross multiply
    20,956.59x = 28,907.42 × 12,891.60
  4. Step 4: Simplify right side
    20,956.59x = 372,662,831.21
  5. Step 5: Solve for x
    x = 372,662,831.21/20,956.59
  6. Step 6: Final answer
    x = 17,782.61

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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.