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Finding the Fourth Proportional to 19,266.51, 28,899.76 and 8,165.41

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Solution

The fourth proportional to 19,266.51, 28,899.76 and 8,165.41 is: 12,248.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,266.51 : 28,899.76 = 8,165.41 : x
  2. Step 2: Convert to fraction form
    19,266.51/28,899.76 = 8,165.41/x
  3. Step 3: Cross multiply
    19,266.51x = 28,899.76 × 8,165.41
  4. Step 4: Simplify right side
    19,266.51x = 235,978,389.30
  5. Step 5: Solve for x
    x = 235,978,389.30/19,266.51
  6. Step 6: Final answer
    x = 12,248.11

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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.