Home / 13,984.38-20,979.45-4,122.72

Finding the Fourth Proportional to 13,984.38, 20,979.45 and 4,122.72

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Solution

The fourth proportional to 13,984.38, 20,979.45 and 4,122.72 is: 6,184.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,984.38 : 20,979.45 = 4,122.72 : x
  2. Step 2: Convert to fraction form
    13,984.38/20,979.45 = 4,122.72/x
  3. Step 3: Cross multiply
    13,984.38x = 20,979.45 × 4,122.72
  4. Step 4: Simplify right side
    13,984.38x = 86,492,398.10
  5. Step 5: Solve for x
    x = 86,492,398.10/13,984.38
  6. Step 6: Final answer
    x = 6,184.93

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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.