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Finding the Fourth Proportional to 19,266.56, 28,899.84 and 5,415.56

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Solution

The fourth proportional to 19,266.56, 28,899.84 and 5,415.56 is: 8,123.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.56 : 28,899.84 = 5,415.56 : x
  2. Step 2: Convert to fraction form
    19,266.56/28,899.84 = 5,415.56/x
  3. Step 3: Cross multiply
    19,266.56x = 28,899.84 × 5,415.56
  4. Step 4: Simplify right side
    19,266.56x = 156,508,910.07
  5. Step 5: Solve for x
    x = 156,508,910.07/19,266.56
  6. Step 6: Final answer
    x = 8,123.34

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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.