Home / 20,814.07-28,728.78-12,851.74

Finding the Fourth Proportional to 20,814.07, 28,728.78 and 12,851.74

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Solution

The fourth proportional to 20,814.07, 28,728.78 and 12,851.74 is: 17,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.07 : 28,728.78 = 12,851.74 : x
  2. Step 2: Convert to fraction form
    20,814.07/28,728.78 = 12,851.74/x
  3. Step 3: Cross multiply
    20,814.07x = 28,728.78 × 12,851.74
  4. Step 4: Simplify right side
    20,814.07x = 369,214,811.08
  5. Step 5: Solve for x
    x = 369,214,811.08/20,814.07
  6. Step 6: Final answer
    x = 17,738.71

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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.