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Finding the Fourth Proportional to 18,483.12, 27,738.72 and 12,651.12

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Solution

The fourth proportional to 18,483.12, 27,738.72 and 12,651.12 is: 18,986.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,483.12 : 27,738.72 = 12,651.12 : x
  2. Step 2: Convert to fraction form
    18,483.12/27,738.72 = 12,651.12/x
  3. Step 3: Cross multiply
    18,483.12x = 27,738.72 × 12,651.12
  4. Step 4: Simplify right side
    18,483.12x = 350,925,875.37
  5. Step 5: Solve for x
    x = 350,925,875.37/18,483.12
  6. Step 6: Final answer
    x = 18,986.29

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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.