Home / 20,297.79-28,015.47-12,338.33

Finding the Fourth Proportional to 20,297.79, 28,015.47 and 12,338.33

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Solution

The fourth proportional to 20,297.79, 28,015.47 and 12,338.33 is: 17,029.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.79 : 28,015.47 = 12,338.33 : x
  2. Step 2: Convert to fraction form
    20,297.79/28,015.47 = 12,338.33/x
  3. Step 3: Cross multiply
    20,297.79x = 28,015.47 × 12,338.33
  4. Step 4: Simplify right side
    20,297.79x = 345,663,973.89
  5. Step 5: Solve for x
    x = 345,663,973.89/20,297.79
  6. Step 6: Final answer
    x = 17,029.64

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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.