Home / 20,927.98-28,880.48-11,367.78

Finding the Fourth Proportional to 20,927.98, 28,880.48 and 11,367.78

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Solution

The fourth proportional to 20,927.98, 28,880.48 and 11,367.78 is: 15,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.98 : 28,880.48 = 11,367.78 : x
  2. Step 2: Convert to fraction form
    20,927.98/28,880.48 = 11,367.78/x
  3. Step 3: Cross multiply
    20,927.98x = 28,880.48 × 11,367.78
  4. Step 4: Simplify right side
    20,927.98x = 328,306,942.93
  5. Step 5: Solve for x
    x = 328,306,942.93/20,927.98
  6. Step 6: Final answer
    x = 15,687.46

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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.