Home / 19,977.48-29,979.57-8,290.68

Finding the Fourth Proportional to 19,977.48, 29,979.57 and 8,290.68

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Solution

The fourth proportional to 19,977.48, 29,979.57 and 8,290.68 is: 12,441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.48 : 29,979.57 = 8,290.68 : x
  2. Step 2: Convert to fraction form
    19,977.48/29,979.57 = 8,290.68/x
  3. Step 3: Cross multiply
    19,977.48x = 29,979.57 × 8,290.68
  4. Step 4: Simplify right side
    19,977.48x = 248,551,021.41
  5. Step 5: Solve for x
    x = 248,551,021.41/19,977.48
  6. Step 6: Final answer
    x = 12,441.56

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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.