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Finding the Fourth Proportional to 18,009.40, 26,981.70 and 11,075.80

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Solution

The fourth proportional to 18,009.40, 26,981.70 and 11,075.80 is: 16,593.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,009.40 : 26,981.70 = 11,075.80 : x
  2. Step 2: Convert to fraction form
    18,009.40/26,981.70 = 11,075.80/x
  3. Step 3: Cross multiply
    18,009.40x = 26,981.70 × 11,075.80
  4. Step 4: Simplify right side
    18,009.40x = 298,843,912.86
  5. Step 5: Solve for x
    x = 298,843,912.86/18,009.40
  6. Step 6: Final answer
    x = 16,593.77

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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.