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Finding the Fourth Proportional to 19,879.67, 29,823.15 and 8,186.51

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Solution

The fourth proportional to 19,879.67, 29,823.15 and 8,186.51 is: 12,281.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.67 : 29,823.15 = 8,186.51 : x
  2. Step 2: Convert to fraction form
    19,879.67/29,823.15 = 8,186.51/x
  3. Step 3: Cross multiply
    19,879.67x = 29,823.15 × 8,186.51
  4. Step 4: Simplify right side
    19,879.67x = 244,147,515.71
  5. Step 5: Solve for x
    x = 244,147,515.71/19,879.67
  6. Step 6: Final answer
    x = 12,281.27

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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.