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Finding the Fourth Proportional to 39,679.08, 59,489.46 and 18,917.16

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Solution

The fourth proportional to 39,679.08, 59,489.46 and 18,917.16 is: 28,361.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.08 : 59,489.46 = 18,917.16 : x
  2. Step 2: Convert to fraction form
    39,679.08/59,489.46 = 18,917.16/x
  3. Step 3: Cross multiply
    39,679.08x = 59,489.46 × 18,917.16
  4. Step 4: Simplify right side
    39,679.08x = 1,125,371,633.13
  5. Step 5: Solve for x
    x = 1,125,371,633.13/39,679.08
  6. Step 6: Final answer
    x = 28,361.84

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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.