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Finding the Fourth Proportional to 9,898.61, 14,850.21 and 2,878.79

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Solution

The fourth proportional to 9,898.61, 14,850.21 and 2,878.79 is: 4,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,898.61 : 14,850.21 = 2,878.79 : x
  2. Step 2: Convert to fraction form
    9,898.61/14,850.21 = 2,878.79/x
  3. Step 3: Cross multiply
    9,898.61x = 14,850.21 × 2,878.79
  4. Step 4: Simplify right side
    9,898.61x = 42,750,636.05
  5. Step 5: Solve for x
    x = 42,750,636.05/9,898.61
  6. Step 6: Final answer
    x = 4,318.85

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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.