Home / 12,780.53-19,150.86-8,090.63

Finding the Fourth Proportional to 12,780.53, 19,150.86 and 8,090.63

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Solution

The fourth proportional to 12,780.53, 19,150.86 and 8,090.63 is: 12,123.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.53 : 19,150.86 = 8,090.63 : x
  2. Step 2: Convert to fraction form
    12,780.53/19,150.86 = 8,090.63/x
  3. Step 3: Cross multiply
    12,780.53x = 19,150.86 × 8,090.63
  4. Step 4: Simplify right side
    12,780.53x = 154,942,522.44
  5. Step 5: Solve for x
    x = 154,942,522.44/12,780.53
  6. Step 6: Final answer
    x = 12,123.33

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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.