Home / 20,976.50-31,464.75-8,664.82

Finding the Fourth Proportional to 20,976.50, 31,464.75 and 8,664.82

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Solution

The fourth proportional to 20,976.50, 31,464.75 and 8,664.82 is: 12,997.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.50 : 31,464.75 = 8,664.82 : x
  2. Step 2: Convert to fraction form
    20,976.50/31,464.75 = 8,664.82/x
  3. Step 3: Cross multiply
    20,976.50x = 31,464.75 × 8,664.82
  4. Step 4: Simplify right side
    20,976.50x = 272,636,395.10
  5. Step 5: Solve for x
    x = 272,636,395.10/20,976.50
  6. Step 6: Final answer
    x = 12,997.23

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1.5x scale

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.