Home / 11,980.22-16,516.59-8,390.36

Finding the Fourth Proportional to 11,980.22, 16,516.59 and 8,390.36

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Solution

The fourth proportional to 11,980.22, 16,516.59 and 8,390.36 is: 11,567.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.22 : 16,516.59 = 8,390.36 : x
  2. Step 2: Convert to fraction form
    11,980.22/16,516.59 = 8,390.36/x
  3. Step 3: Cross multiply
    11,980.22x = 16,516.59 × 8,390.36
  4. Step 4: Simplify right side
    11,980.22x = 138,580,053.49
  5. Step 5: Solve for x
    x = 138,580,053.49/11,980.22
  6. Step 6: Final answer
    x = 11,567.41

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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.