Home / 20,389.36-28,137.74-11,437.49

Finding the Fourth Proportional to 20,389.36, 28,137.74 and 11,437.49

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Solution

The fourth proportional to 20,389.36, 28,137.74 and 11,437.49 is: 15,783.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.36 : 28,137.74 = 11,437.49 : x
  2. Step 2: Convert to fraction form
    20,389.36/28,137.74 = 11,437.49/x
  3. Step 3: Cross multiply
    20,389.36x = 28,137.74 × 11,437.49
  4. Step 4: Simplify right side
    20,389.36x = 321,825,119.87
  5. Step 5: Solve for x
    x = 321,825,119.87/20,389.36
  6. Step 6: Final answer
    x = 15,783.97

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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.