Home / 12,585.86-18,871.43-5,181.96

Finding the Fourth Proportional to 12,585.86, 18,871.43 and 5,181.96

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Solution

The fourth proportional to 12,585.86, 18,871.43 and 5,181.96 is: 7,769.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.86 : 18,871.43 = 5,181.96 : x
  2. Step 2: Convert to fraction form
    12,585.86/18,871.43 = 5,181.96/x
  3. Step 3: Cross multiply
    12,585.86x = 18,871.43 × 5,181.96
  4. Step 4: Simplify right side
    12,585.86x = 97,790,969.49
  5. Step 5: Solve for x
    x = 97,790,969.49/12,585.86
  6. Step 6: Final answer
    x = 7,769.91

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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.