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Finding the Fourth Proportional to 18,984.74, 28,478.48 and 5,475.35

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Solution

The fourth proportional to 18,984.74, 28,478.48 and 5,475.35 is: 8,213.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.74 : 28,478.48 = 5,475.35 : x
  2. Step 2: Convert to fraction form
    18,984.74/28,478.48 = 5,475.35/x
  3. Step 3: Cross multiply
    18,984.74x = 28,478.48 × 5,475.35
  4. Step 4: Simplify right side
    18,984.74x = 155,929,475.70
  5. Step 5: Solve for x
    x = 155,929,475.70/18,984.74
  6. Step 6: Final answer
    x = 8,213.41

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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.