Home / 12,845.80-19,278.44-5,455.45

Finding the Fourth Proportional to 12,845.80, 19,278.44 and 5,455.45

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Solution

The fourth proportional to 12,845.80, 19,278.44 and 5,455.45 is: 8,187.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.80 : 19,278.44 = 5,455.45 : x
  2. Step 2: Convert to fraction form
    12,845.80/19,278.44 = 5,455.45/x
  3. Step 3: Cross multiply
    12,845.80x = 19,278.44 × 5,455.45
  4. Step 4: Simplify right side
    12,845.80x = 105,172,503.66
  5. Step 5: Solve for x
    x = 105,172,503.66/12,845.80
  6. Step 6: Final answer
    x = 8,187.31

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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.