Home / 20,782.56-31,184.27-9,690.12

Finding the Fourth Proportional to 20,782.56, 31,184.27 and 9,690.12

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Solution

The fourth proportional to 20,782.56, 31,184.27 and 9,690.12 is: 14,540.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.56 : 31,184.27 = 9,690.12 : x
  2. Step 2: Convert to fraction form
    20,782.56/31,184.27 = 9,690.12/x
  3. Step 3: Cross multiply
    20,782.56x = 31,184.27 × 9,690.12
  4. Step 4: Simplify right side
    20,782.56x = 302,179,269.96
  5. Step 5: Solve for x
    x = 302,179,269.96/20,782.56
  6. Step 6: Final answer
    x = 14,540.04

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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.