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Finding the Fourth Proportional to 18,951.21, 28,426.88 and 5,803.52

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Solution

The fourth proportional to 18,951.21, 28,426.88 and 5,803.52 is: 8,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.21 : 28,426.88 = 5,803.52 : x
  2. Step 2: Convert to fraction form
    18,951.21/28,426.88 = 5,803.52/x
  3. Step 3: Cross multiply
    18,951.21x = 28,426.88 × 5,803.52
  4. Step 4: Simplify right side
    18,951.21x = 164,975,966.62
  5. Step 5: Solve for x
    x = 164,975,966.62/18,951.21
  6. Step 6: Final answer
    x = 8,705.30

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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.