Home / 12,128.10-16,737.75-6,822.60

Finding the Fourth Proportional to 12,128.10, 16,737.75 and 6,822.60

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Solution

The fourth proportional to 12,128.10, 16,737.75 and 6,822.60 is: 9,415.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.10 : 16,737.75 = 6,822.60 : x
  2. Step 2: Convert to fraction form
    12,128.10/16,737.75 = 6,822.60/x
  3. Step 3: Cross multiply
    12,128.10x = 16,737.75 × 6,822.60
  4. Step 4: Simplify right side
    12,128.10x = 114,194,973.15
  5. Step 5: Solve for x
    x = 114,194,973.15/12,128.10
  6. Step 6: Final answer
    x = 9,415.73

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1.5x scale

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.