Home / 12,912.10-19,343.85-6,650.80

Finding the Fourth Proportional to 12,912.10, 19,343.85 and 6,650.80

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Solution

The fourth proportional to 12,912.10, 19,343.85 and 6,650.80 is: 9,963.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.10 : 19,343.85 = 6,650.80 : x
  2. Step 2: Convert to fraction form
    12,912.10/19,343.85 = 6,650.80/x
  3. Step 3: Cross multiply
    12,912.10x = 19,343.85 × 6,650.80
  4. Step 4: Simplify right side
    12,912.10x = 128,652,077.58
  5. Step 5: Solve for x
    x = 128,652,077.58/12,912.10
  6. Step 6: Final answer
    x = 9,963.68

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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.