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Finding the Fourth Proportional to 20,959.93, 31,443.02 and 6,921.44

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Solution

The fourth proportional to 20,959.93, 31,443.02 and 6,921.44 is: 10,383.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.93 : 31,443.02 = 6,921.44 : x
  2. Step 2: Convert to fraction form
    20,959.93/31,443.02 = 6,921.44/x
  3. Step 3: Cross multiply
    20,959.93x = 31,443.02 × 6,921.44
  4. Step 4: Simplify right side
    20,959.93x = 217,630,941.74
  5. Step 5: Solve for x
    x = 217,630,941.74/20,959.93
  6. Step 6: Final answer
    x = 10,383.19

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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.