Home / 20,518.82-28,315.98-11,087.36

Finding the Fourth Proportional to 20,518.82, 28,315.98 and 11,087.36

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Solution

The fourth proportional to 20,518.82, 28,315.98 and 11,087.36 is: 15,300.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.82 : 28,315.98 = 11,087.36 : x
  2. Step 2: Convert to fraction form
    20,518.82/28,315.98 = 11,087.36/x
  3. Step 3: Cross multiply
    20,518.82x = 28,315.98 × 11,087.36
  4. Step 4: Simplify right side
    20,518.82x = 313,949,464.01
  5. Step 5: Solve for x
    x = 313,949,464.01/20,518.82
  6. Step 6: Final answer
    x = 15,300.56

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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.