Home / 8,721.02-13,078.08-3,171.34

Finding the Fourth Proportional to 8,721.02, 13,078.08 and 3,171.34

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Solution

The fourth proportional to 8,721.02, 13,078.08 and 3,171.34 is: 4,755.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.02 : 13,078.08 = 3,171.34 : x
  2. Step 2: Convert to fraction form
    8,721.02/13,078.08 = 3,171.34/x
  3. Step 3: Cross multiply
    8,721.02x = 13,078.08 × 3,171.34
  4. Step 4: Simplify right side
    8,721.02x = 41,475,038.23
  5. Step 5: Solve for x
    x = 41,475,038.23/8,721.02
  6. Step 6: Final answer
    x = 4,755.76

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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.