Home / 20,690.37-28,551.78-11,258.91

Finding the Fourth Proportional to 20,690.37, 28,551.78 and 11,258.91

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Solution

The fourth proportional to 20,690.37, 28,551.78 and 11,258.91 is: 15,536.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.37 : 28,551.78 = 11,258.91 : x
  2. Step 2: Convert to fraction form
    20,690.37/28,551.78 = 11,258.91/x
  3. Step 3: Cross multiply
    20,690.37x = 28,551.78 × 11,258.91
  4. Step 4: Simplify right side
    20,690.37x = 321,461,921.36
  5. Step 5: Solve for x
    x = 321,461,921.36/20,690.37
  6. Step 6: Final answer
    x = 15,536.79

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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.