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Finding the Fourth Proportional to 14,754.64, 20,361.48 and 8,130.64

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Solution

The fourth proportional to 14,754.64, 20,361.48 and 8,130.64 is: 11,220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,754.64 : 20,361.48 = 8,130.64 : x
  2. Step 2: Convert to fraction form
    14,754.64/20,361.48 = 8,130.64/x
  3. Step 3: Cross multiply
    14,754.64x = 20,361.48 × 8,130.64
  4. Step 4: Simplify right side
    14,754.64x = 165,551,863.75
  5. Step 5: Solve for x
    x = 165,551,863.75/14,754.64
  6. Step 6: Final answer
    x = 11,220.33

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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.