Home / 20,828.64-28,744.32-11,877.60

Finding the Fourth Proportional to 20,828.64, 28,744.32 and 11,877.60

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Solution

The fourth proportional to 20,828.64, 28,744.32 and 11,877.60 is: 16,391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.64 : 28,744.32 = 11,877.60 : x
  2. Step 2: Convert to fraction form
    20,828.64/28,744.32 = 11,877.60/x
  3. Step 3: Cross multiply
    20,828.64x = 28,744.32 × 11,877.60
  4. Step 4: Simplify right side
    20,828.64x = 341,413,535.23
  5. Step 5: Solve for x
    x = 341,413,535.23/20,828.64
  6. Step 6: Final answer
    x = 16,391.54

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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.