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Finding the Fourth Proportional to 10,325.56, 15,479.56 and 4,089.96

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Solution

The fourth proportional to 10,325.56, 15,479.56 and 4,089.96 is: 6,131.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,325.56 : 15,479.56 = 4,089.96 : x
  2. Step 2: Convert to fraction form
    10,325.56/15,479.56 = 4,089.96/x
  3. Step 3: Cross multiply
    10,325.56x = 15,479.56 × 4,089.96
  4. Step 4: Simplify right side
    10,325.56x = 63,310,781.22
  5. Step 5: Solve for x
    x = 63,310,781.22/10,325.56
  6. Step 6: Final answer
    x = 6,131.46

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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.