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Finding the Fourth Proportional to 30,152.64, 45,231.84 and 13,512

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Solution

The fourth proportional to 30,152.64, 45,231.84 and 13,512 is: 20,269.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,152.64 : 45,231.84 = 13,512 : x
  2. Step 2: Convert to fraction form
    30,152.64/45,231.84 = 13,512/x
  3. Step 3: Cross multiply
    30,152.64x = 45,231.84 × 13,512
  4. Step 4: Simplify right side
    30,152.64x = 611,172,622.08
  5. Step 5: Solve for x
    x = 611,172,622.08/30,152.64
  6. Step 6: Final answer
    x = 20,269.29

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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.