Home / 13,853.40-19,116.72-8,187.90

Finding the Fourth Proportional to 13,853.40, 19,116.72 and 8,187.90

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Solution

The fourth proportional to 13,853.40, 19,116.72 and 8,187.90 is: 11,298.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,853.40 : 19,116.72 = 8,187.90 : x
  2. Step 2: Convert to fraction form
    13,853.40/19,116.72 = 8,187.90/x
  3. Step 3: Cross multiply
    13,853.40x = 19,116.72 × 8,187.90
  4. Step 4: Simplify right side
    13,853.40x = 156,525,791.69
  5. Step 5: Solve for x
    x = 156,525,791.69/13,853.40
  6. Step 6: Final answer
    x = 11,298.73

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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.