Home / 13,378.76-18,462.12-8,072.36

Finding the Fourth Proportional to 13,378.76, 18,462.12 and 8,072.36

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Solution

The fourth proportional to 13,378.76, 18,462.12 and 8,072.36 is: 11,139.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.76 : 18,462.12 = 8,072.36 : x
  2. Step 2: Convert to fraction form
    13,378.76/18,462.12 = 8,072.36/x
  3. Step 3: Cross multiply
    13,378.76x = 18,462.12 × 8,072.36
  4. Step 4: Simplify right side
    13,378.76x = 149,032,879.00
  5. Step 5: Solve for x
    x = 149,032,879.00/13,378.76
  6. Step 6: Final answer
    x = 11,139.51

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Double scale
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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.