Home / 28,620.85-39,496.79-15,873.60

Finding the Fourth Proportional to 28,620.85, 39,496.79 and 15,873.60

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Solution

The fourth proportional to 28,620.85, 39,496.79 and 15,873.60 is: 21,905.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.85 : 39,496.79 = 15,873.60 : x
  2. Step 2: Convert to fraction form
    28,620.85/39,496.79 = 15,873.60/x
  3. Step 3: Cross multiply
    28,620.85x = 39,496.79 × 15,873.60
  4. Step 4: Simplify right side
    28,620.85x = 626,956,480.78
  5. Step 5: Solve for x
    x = 626,956,480.78/28,620.85
  6. Step 6: Final answer
    x = 21,905.58

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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.