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Finding the Fourth Proportional to 39,892.08, 55,071.04 and 30,919.44

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Solution

The fourth proportional to 39,892.08, 55,071.04 and 30,919.44 is: 42,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,892.08 : 55,071.04 = 30,919.44 : x
  2. Step 2: Convert to fraction form
    39,892.08/55,071.04 = 30,919.44/x
  3. Step 3: Cross multiply
    39,892.08x = 55,071.04 × 30,919.44
  4. Step 4: Simplify right side
    39,892.08x = 1,702,765,717.02
  5. Step 5: Solve for x
    x = 1,702,765,717.02/39,892.08
  6. Step 6: Final answer
    x = 42,684.31

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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.