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Finding the Fourth Proportional to 18,750.52, 28,139.63 and 8,889.83

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Solution

The fourth proportional to 18,750.52, 28,139.63 and 8,889.83 is: 13,341.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.52 : 28,139.63 = 8,889.83 : x
  2. Step 2: Convert to fraction form
    18,750.52/28,139.63 = 8,889.83/x
  3. Step 3: Cross multiply
    18,750.52x = 28,139.63 × 8,889.83
  4. Step 4: Simplify right side
    18,750.52x = 250,156,447.34
  5. Step 5: Solve for x
    x = 250,156,447.34/18,750.52
  6. Step 6: Final answer
    x = 13,341.31

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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.