Home / 21,165.28-31,745.69-8,686.62

Finding the Fourth Proportional to 21,165.28, 31,745.69 and 8,686.62

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Solution

The fourth proportional to 21,165.28, 31,745.69 and 8,686.62 is: 13,029.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.28 : 31,745.69 = 8,686.62 : x
  2. Step 2: Convert to fraction form
    21,165.28/31,745.69 = 8,686.62/x
  3. Step 3: Cross multiply
    21,165.28x = 31,745.69 × 8,686.62
  4. Step 4: Simplify right side
    21,165.28x = 275,762,702.23
  5. Step 5: Solve for x
    x = 275,762,702.23/21,165.28
  6. Step 6: Final answer
    x = 13,029.02

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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.