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Finding the Fourth Proportional to 18,893.86, 28,345.11 and 5,748.10

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Solution

The fourth proportional to 18,893.86, 28,345.11 and 5,748.10 is: 8,623.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893.86 : 28,345.11 = 5,748.10 : x
  2. Step 2: Convert to fraction form
    18,893.86/28,345.11 = 5,748.10/x
  3. Step 3: Cross multiply
    18,893.86x = 28,345.11 × 5,748.10
  4. Step 4: Simplify right side
    18,893.86x = 162,930,526.79
  5. Step 5: Solve for x
    x = 162,930,526.79/18,893.86
  6. Step 6: Final answer
    x = 8,623.46

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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.