Home / 20,679.12-31,017.96-8,992.36

Finding the Fourth Proportional to 20,679.12, 31,017.96 and 8,992.36

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Solution

The fourth proportional to 20,679.12, 31,017.96 and 8,992.36 is: 13,488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.12 : 31,017.96 = 8,992.36 : x
  2. Step 2: Convert to fraction form
    20,679.12/31,017.96 = 8,992.36/x
  3. Step 3: Cross multiply
    20,679.12x = 31,017.96 × 8,992.36
  4. Step 4: Simplify right side
    20,679.12x = 278,924,662.79
  5. Step 5: Solve for x
    x = 278,924,662.79/20,679.12
  6. Step 6: Final answer
    x = 13,488.23

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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.