Home / 18,678.08-27,981.27-12,419.21

Finding the Fourth Proportional to 18,678.08, 27,981.27 and 12,419.21

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Solution

The fourth proportional to 18,678.08, 27,981.27 and 12,419.21 is: 18,604.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.08 : 27,981.27 = 12,419.21 : x
  2. Step 2: Convert to fraction form
    18,678.08/27,981.27 = 12,419.21/x
  3. Step 3: Cross multiply
    18,678.08x = 27,981.27 × 12,419.21
  4. Step 4: Simplify right side
    18,678.08x = 347,505,128.29
  5. Step 5: Solve for x
    x = 347,505,128.29/18,678.08
  6. Step 6: Final answer
    x = 18,604.98

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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.