Home / 19,977.66-29,979.86-8,290.89

Finding the Fourth Proportional to 19,977.66, 29,979.86 and 8,290.89

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Solution

The fourth proportional to 19,977.66, 29,979.86 and 8,290.89 is: 12,441.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.66 : 29,979.86 = 8,290.89 : x
  2. Step 2: Convert to fraction form
    19,977.66/29,979.86 = 8,290.89/x
  3. Step 3: Cross multiply
    19,977.66x = 29,979.86 × 8,290.89
  4. Step 4: Simplify right side
    19,977.66x = 248,559,680.02
  5. Step 5: Solve for x
    x = 248,559,680.02/19,977.66
  6. Step 6: Final answer
    x = 12,441.88

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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.