Home / 12,783.89-19,150.31-10,155.85

Finding the Fourth Proportional to 12,783.89, 19,150.31 and 10,155.85

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Solution

The fourth proportional to 12,783.89, 19,150.31 and 10,155.85 is: 15,213.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.89 : 19,150.31 = 10,155.85 : x
  2. Step 2: Convert to fraction form
    12,783.89/19,150.31 = 10,155.85/x
  3. Step 3: Cross multiply
    12,783.89x = 19,150.31 × 10,155.85
  4. Step 4: Simplify right side
    12,783.89x = 194,487,653.33
  5. Step 5: Solve for x
    x = 194,487,653.33/12,783.89
  6. Step 6: Final answer
    x = 15,213.49

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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.