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Finding the Fourth Proportional to 18,889.49, 28,339.72 and 7,794.11

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Solution

The fourth proportional to 18,889.49, 28,339.72 and 7,794.11 is: 11,693.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.49 : 28,339.72 = 7,794.11 : x
  2. Step 2: Convert to fraction form
    18,889.49/28,339.72 = 7,794.11/x
  3. Step 3: Cross multiply
    18,889.49x = 28,339.72 × 7,794.11
  4. Step 4: Simplify right side
    18,889.49x = 220,882,946.41
  5. Step 5: Solve for x
    x = 220,882,946.41/18,889.49
  6. Step 6: Final answer
    x = 11,693.43

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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.