Home / 20,830.83-28,747.82-11,880.06

Finding the Fourth Proportional to 20,830.83, 28,747.82 and 11,880.06

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Solution

The fourth proportional to 20,830.83, 28,747.82 and 11,880.06 is: 16,395.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.83 : 28,747.82 = 11,880.06 : x
  2. Step 2: Convert to fraction form
    20,830.83/28,747.82 = 11,880.06/x
  3. Step 3: Cross multiply
    20,830.83x = 28,747.82 × 11,880.06
  4. Step 4: Simplify right side
    20,830.83x = 341,525,767.07
  5. Step 5: Solve for x
    x = 341,525,767.07/20,830.83
  6. Step 6: Final answer
    x = 16,395.21

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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.