Home / 20,927.90-28,880.37-11,367.69

Finding the Fourth Proportional to 20,927.90, 28,880.37 and 11,367.69

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Solution

The fourth proportional to 20,927.90, 28,880.37 and 11,367.69 is: 15,687.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.90 : 28,880.37 = 11,367.69 : x
  2. Step 2: Convert to fraction form
    20,927.90/28,880.37 = 11,367.69/x
  3. Step 3: Cross multiply
    20,927.90x = 28,880.37 × 11,367.69
  4. Step 4: Simplify right side
    20,927.90x = 328,303,093.25
  5. Step 5: Solve for x
    x = 328,303,093.25/20,927.90
  6. Step 6: Final answer
    x = 15,687.34

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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.