Home / 12,780.10-19,146.39-6,941.62

Finding the Fourth Proportional to 12,780.10, 19,146.39 and 6,941.62

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Solution

The fourth proportional to 12,780.10, 19,146.39 and 6,941.62 is: 10,399.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.10 : 19,146.39 = 6,941.62 : x
  2. Step 2: Convert to fraction form
    12,780.10/19,146.39 = 6,941.62/x
  3. Step 3: Cross multiply
    12,780.10x = 19,146.39 × 6,941.62
  4. Step 4: Simplify right side
    12,780.10x = 132,906,963.75
  5. Step 5: Solve for x
    x = 132,906,963.75/12,780.10
  6. Step 6: Final answer
    x = 10,399.52

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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.