Home / 20,759.40-28,647.78-12,798.44

Finding the Fourth Proportional to 20,759.40, 28,647.78 and 12,798.44

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Solution

The fourth proportional to 20,759.40, 28,647.78 and 12,798.44 is: 17,661.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.40 : 28,647.78 = 12,798.44 : x
  2. Step 2: Convert to fraction form
    20,759.40/28,647.78 = 12,798.44/x
  3. Step 3: Cross multiply
    20,759.40x = 28,647.78 × 12,798.44
  4. Step 4: Simplify right side
    20,759.40x = 366,646,893.46
  5. Step 5: Solve for x
    x = 366,646,893.46/20,759.40
  6. Step 6: Final answer
    x = 17,661.73

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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.