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Finding the Fourth Proportional to 10,305, 15,457.62 and 3,379.80

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Solution

The fourth proportional to 10,305, 15,457.62 and 3,379.80 is: 5,069.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,305 : 15,457.62 = 3,379.80 : x
  2. Step 2: Convert to fraction form
    10,305/15,457.62 = 3,379.80/x
  3. Step 3: Cross multiply
    10,305x = 15,457.62 × 3,379.80
  4. Step 4: Simplify right side
    10,305x = 52,243,664.08
  5. Step 5: Solve for x
    x = 52,243,664.08/10,305
  6. Step 6: Final answer
    x = 5,069.74

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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.