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Finding the Fourth Proportional to 7,057.68, 9,740.28 and 3,914.64

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Solution

The fourth proportional to 7,057.68, 9,740.28 and 3,914.64 is: 5,402.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,057.68 : 9,740.28 = 3,914.64 : x
  2. Step 2: Convert to fraction form
    7,057.68/9,740.28 = 3,914.64/x
  3. Step 3: Cross multiply
    7,057.68x = 9,740.28 × 3,914.64
  4. Step 4: Simplify right side
    7,057.68x = 38,129,689.70
  5. Step 5: Solve for x
    x = 38,129,689.70/7,057.68
  6. Step 6: Final answer
    x = 5,402.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.