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Finding the Fourth Proportional to 30,361.52, 45,551.08 and 12,588.88

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Solution

The fourth proportional to 30,361.52, 45,551.08 and 12,588.88 is: 18,886.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,361.52 : 45,551.08 = 12,588.88 : x
  2. Step 2: Convert to fraction form
    30,361.52/45,551.08 = 12,588.88/x
  3. Step 3: Cross multiply
    30,361.52x = 45,551.08 × 12,588.88
  4. Step 4: Simplify right side
    30,361.52x = 573,437,079.99
  5. Step 5: Solve for x
    x = 573,437,079.99/30,361.52
  6. Step 6: Final answer
    x = 18,886.97

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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.