Home / 12,129.20-16,737.36-6,822.96

Finding the Fourth Proportional to 12,129.20, 16,737.36 and 6,822.96

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Solution

The fourth proportional to 12,129.20, 16,737.36 and 6,822.96 is: 9,415.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.20 : 16,737.36 = 6,822.96 : x
  2. Step 2: Convert to fraction form
    12,129.20/16,737.36 = 6,822.96/x
  3. Step 3: Cross multiply
    12,129.20x = 16,737.36 × 6,822.96
  4. Step 4: Simplify right side
    12,129.20x = 114,198,337.79
  5. Step 5: Solve for x
    x = 114,198,337.79/12,129.20
  6. Step 6: Final answer
    x = 9,415.16

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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.