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Finding the Fourth Proportional to 19,485.50, 26,890 and 11,102

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Solution

The fourth proportional to 19,485.50, 26,890 and 11,102 is: 15,320.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,485.50 : 26,890 = 11,102 : x
  2. Step 2: Convert to fraction form
    19,485.50/26,890 = 11,102/x
  3. Step 3: Cross multiply
    19,485.50x = 26,890 × 11,102
  4. Step 4: Simplify right side
    19,485.50x = 298,532,780
  5. Step 5: Solve for x
    x = 298,532,780/19,485.50
  6. Step 6: Final answer
    x = 15,320.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.