Home / 19,418.89-29,128.32-8,318.38

Finding the Fourth Proportional to 19,418.89, 29,128.32 and 8,318.38

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Solution

The fourth proportional to 19,418.89, 29,128.32 and 8,318.38 is: 12,477.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,418.89 : 29,128.32 = 8,318.38 : x
  2. Step 2: Convert to fraction form
    19,418.89/29,128.32 = 8,318.38/x
  3. Step 3: Cross multiply
    19,418.89x = 29,128.32 × 8,318.38
  4. Step 4: Simplify right side
    19,418.89x = 242,300,247.29
  5. Step 5: Solve for x
    x = 242,300,247.29/19,418.89
  6. Step 6: Final answer
    x = 12,477.56

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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.