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Finding the Fourth Proportional to 18,285.54, 27,436.95 and 17,990.70

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Solution

The fourth proportional to 18,285.54, 27,436.95 and 17,990.70 is: 26,994.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.54 : 27,436.95 = 17,990.70 : x
  2. Step 2: Convert to fraction form
    18,285.54/27,436.95 = 17,990.70/x
  3. Step 3: Cross multiply
    18,285.54x = 27,436.95 × 17,990.70
  4. Step 4: Simplify right side
    18,285.54x = 493,609,936.37
  5. Step 5: Solve for x
    x = 493,609,936.37/18,285.54
  6. Step 6: Final answer
    x = 26,994.55

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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.