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Finding the Fourth Proportional to 7,057.74, 9,739.44 and 3,913.86

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Solution

The fourth proportional to 7,057.74, 9,739.44 and 3,913.86 is: 5,400.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,057.74 : 9,739.44 = 3,913.86 : x
  2. Step 2: Convert to fraction form
    7,057.74/9,739.44 = 3,913.86/x
  3. Step 3: Cross multiply
    7,057.74x = 9,739.44 × 3,913.86
  4. Step 4: Simplify right side
    7,057.74x = 38,118,804.64
  5. Step 5: Solve for x
    x = 38,118,804.64/7,057.74
  6. Step 6: Final answer
    x = 5,400.99

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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.