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Finding the Fourth Proportional to 18,913.80, 28,358.52 and 9,052.84

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Solution

The fourth proportional to 18,913.80, 28,358.52 and 9,052.84 is: 13,573.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.80 : 28,358.52 = 9,052.84 : x
  2. Step 2: Convert to fraction form
    18,913.80/28,358.52 = 9,052.84/x
  3. Step 3: Cross multiply
    18,913.80x = 28,358.52 × 9,052.84
  4. Step 4: Simplify right side
    18,913.80x = 256,725,144.20
  5. Step 5: Solve for x
    x = 256,725,144.20/18,913.80
  6. Step 6: Final answer
    x = 13,573.43

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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.