Home / 28,023.36-38,640.24-20,937.84

Finding the Fourth Proportional to 28,023.36, 38,640.24 and 20,937.84

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Solution

The fourth proportional to 28,023.36, 38,640.24 and 20,937.84 is: 28,870.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,023.36 : 38,640.24 = 20,937.84 : x
  2. Step 2: Convert to fraction form
    28,023.36/38,640.24 = 20,937.84/x
  3. Step 3: Cross multiply
    28,023.36x = 38,640.24 × 20,937.84
  4. Step 4: Simplify right side
    28,023.36x = 809,043,162.68
  5. Step 5: Solve for x
    x = 809,043,162.68/28,023.36
  6. Step 6: Final answer
    x = 28,870.31

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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.