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Finding the Fourth Proportional to 19,274.94, 28,912.40 and 5,423.94

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Solution

The fourth proportional to 19,274.94, 28,912.40 and 5,423.94 is: 8,135.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,274.94 : 28,912.40 = 5,423.94 : x
  2. Step 2: Convert to fraction form
    19,274.94/28,912.40 = 5,423.94/x
  3. Step 3: Cross multiply
    19,274.94x = 28,912.40 × 5,423.94
  4. Step 4: Simplify right side
    19,274.94x = 156,819,122.86
  5. Step 5: Solve for x
    x = 156,819,122.86/19,274.94
  6. Step 6: Final answer
    x = 8,135.91

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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.