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Finding the Fourth Proportional to 19,485, 26,889.30 and 11,101.50

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Solution

The fourth proportional to 19,485, 26,889.30 and 11,101.50 is: 15,320.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,485 : 26,889.30 = 11,101.50 : x
  2. Step 2: Convert to fraction form
    19,485/26,889.30 = 11,101.50/x
  3. Step 3: Cross multiply
    19,485x = 26,889.30 × 11,101.50
  4. Step 4: Simplify right side
    19,485x = 298,511,563.95
  5. Step 5: Solve for x
    x = 298,511,563.95/19,485
  6. Step 6: Final answer
    x = 15,320.07

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1.5x scale

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.