Home / 13,511.39-18,651.41-8,207.91

Finding the Fourth Proportional to 13,511.39, 18,651.41 and 8,207.91

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Solution

The fourth proportional to 13,511.39, 18,651.41 and 8,207.91 is: 11,330.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.39 : 18,651.41 = 8,207.91 : x
  2. Step 2: Convert to fraction form
    13,511.39/18,651.41 = 8,207.91/x
  3. Step 3: Cross multiply
    13,511.39x = 18,651.41 × 8,207.91
  4. Step 4: Simplify right side
    13,511.39x = 153,089,053.61
  5. Step 5: Solve for x
    x = 153,089,053.61/13,511.39
  6. Step 6: Final answer
    x = 11,330.37

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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.