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Finding the Fourth Proportional to 39,181.50, 54,070.50 and 21,276.51

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Solution

The fourth proportional to 39,181.50, 54,070.50 and 21,276.51 is: 29,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,181.50 : 54,070.50 = 21,276.51 : x
  2. Step 2: Convert to fraction form
    39,181.50/54,070.50 = 21,276.51/x
  3. Step 3: Cross multiply
    39,181.50x = 54,070.50 × 21,276.51
  4. Step 4: Simplify right side
    39,181.50x = 1,150,431,533.96
  5. Step 5: Solve for x
    x = 1,150,431,533.96/39,181.50
  6. Step 6: Final answer
    x = 29,361.60

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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.