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Finding the Fourth Proportional to 3,971, 5,481.20 and 2,926.10

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Solution

The fourth proportional to 3,971, 5,481.20 and 2,926.10 is: 4,038.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971 : 5,481.20 = 2,926.10 : x
  2. Step 2: Convert to fraction form
    3,971/5,481.20 = 2,926.10/x
  3. Step 3: Cross multiply
    3,971x = 5,481.20 × 2,926.10
  4. Step 4: Simplify right side
    3,971x = 16,038,539.32
  5. Step 5: Solve for x
    x = 16,038,539.32/3,971
  6. Step 6: Final answer
    x = 4,038.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.