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Finding the Fourth Proportional to 18,778.94, 28,166.58 and 4,927.94

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Solution

The fourth proportional to 18,778.94, 28,166.58 and 4,927.94 is: 7,391.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.94 : 28,166.58 = 4,927.94 : x
  2. Step 2: Convert to fraction form
    18,778.94/28,166.58 = 4,927.94/x
  3. Step 3: Cross multiply
    18,778.94x = 28,166.58 × 4,927.94
  4. Step 4: Simplify right side
    18,778.94x = 138,803,286.66
  5. Step 5: Solve for x
    x = 138,803,286.66/18,778.94
  6. Step 6: Final answer
    x = 7,391.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.