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Finding the Fourth Proportional to 10,503.88, 15,756.12 and 3,928.81

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Solution

The fourth proportional to 10,503.88, 15,756.12 and 3,928.81 is: 5,893.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,503.88 : 15,756.12 = 3,928.81 : x
  2. Step 2: Convert to fraction form
    10,503.88/15,756.12 = 3,928.81/x
  3. Step 3: Cross multiply
    10,503.88x = 15,756.12 × 3,928.81
  4. Step 4: Simplify right side
    10,503.88x = 61,902,762.43
  5. Step 5: Solve for x
    x = 61,902,762.43/10,503.88
  6. Step 6: Final answer
    x = 5,893.32

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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.