Home / 28,858.50-39,824.73-20,489.58

Finding the Fourth Proportional to 28,858.50, 39,824.73 and 20,489.58

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Solution

The fourth proportional to 28,858.50, 39,824.73 and 20,489.58 is: 28,275.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,858.50 : 39,824.73 = 20,489.58 : x
  2. Step 2: Convert to fraction form
    28,858.50/39,824.73 = 20,489.58/x
  3. Step 3: Cross multiply
    28,858.50x = 39,824.73 × 20,489.58
  4. Step 4: Simplify right side
    28,858.50x = 815,991,991.31
  5. Step 5: Solve for x
    x = 815,991,991.31/28,858.50
  6. Step 6: Final answer
    x = 28,275.62

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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.