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Finding the Fourth Proportional to 45,015.32, 67,512.48 and 13,422.48

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Solution

The fourth proportional to 45,015.32, 67,512.48 and 13,422.48 is: 20,130.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,015.32 : 67,512.48 = 13,422.48 : x
  2. Step 2: Convert to fraction form
    45,015.32/67,512.48 = 13,422.48/x
  3. Step 3: Cross multiply
    45,015.32x = 67,512.48 × 13,422.48
  4. Step 4: Simplify right side
    45,015.32x = 906,184,912.55
  5. Step 5: Solve for x
    x = 906,184,912.55/45,015.32
  6. Step 6: Final answer
    x = 20,130.59

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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.