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Finding the Fourth Proportional to 5,558.64, 7,666.65 and 3,879.51

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Solution

The fourth proportional to 5,558.64, 7,666.65 and 3,879.51 is: 5,350.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,558.64 : 7,666.65 = 3,879.51 : x
  2. Step 2: Convert to fraction form
    5,558.64/7,666.65 = 3,879.51/x
  3. Step 3: Cross multiply
    5,558.64x = 7,666.65 × 3,879.51
  4. Step 4: Simplify right side
    5,558.64x = 29,742,845.34
  5. Step 5: Solve for x
    x = 29,742,845.34/5,558.64
  6. Step 6: Final answer
    x = 5,350.74

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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.