Home / 13,855.79-19,116.25-7,885.97

Finding the Fourth Proportional to 13,855.79, 19,116.25 and 7,885.97

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Solution

The fourth proportional to 13,855.79, 19,116.25 and 7,885.97 is: 10,879.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.79 : 19,116.25 = 7,885.97 : x
  2. Step 2: Convert to fraction form
    13,855.79/19,116.25 = 7,885.97/x
  3. Step 3: Cross multiply
    13,855.79x = 19,116.25 × 7,885.97
  4. Step 4: Simplify right side
    13,855.79x = 150,750,174.01
  5. Step 5: Solve for x
    x = 150,750,174.01/13,855.79
  6. Step 6: Final answer
    x = 10,879.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.