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Finding the Fourth Proportional to 19,086.63, 28,630.75 and 5,235.63

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Solution

The fourth proportional to 19,086.63, 28,630.75 and 5,235.63 is: 7,853.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,086.63 : 28,630.75 = 5,235.63 : x
  2. Step 2: Convert to fraction form
    19,086.63/28,630.75 = 5,235.63/x
  3. Step 3: Cross multiply
    19,086.63x = 28,630.75 × 5,235.63
  4. Step 4: Simplify right side
    19,086.63x = 149,900,013.62
  5. Step 5: Solve for x
    x = 149,900,013.62/19,086.63
  6. Step 6: Final answer
    x = 7,853.67

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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.