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Finding the Fourth Proportional to 18,789.63, 28,146.16 and 8,898.92

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Solution

The fourth proportional to 18,789.63, 28,146.16 and 8,898.92 is: 13,330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.63 : 28,146.16 = 8,898.92 : x
  2. Step 2: Convert to fraction form
    18,789.63/28,146.16 = 8,898.92/x
  3. Step 3: Cross multiply
    18,789.63x = 28,146.16 × 8,898.92
  4. Step 4: Simplify right side
    18,789.63x = 250,470,474.27
  5. Step 5: Solve for x
    x = 250,470,474.27/18,789.63
  6. Step 6: Final answer
    x = 13,330.25

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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.