Home / 13,978.58-19,289.34-8,672.37

Finding the Fourth Proportional to 13,978.58, 19,289.34 and 8,672.37

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Solution

The fourth proportional to 13,978.58, 19,289.34 and 8,672.37 is: 11,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,978.58 : 19,289.34 = 8,672.37 : x
  2. Step 2: Convert to fraction form
    13,978.58/19,289.34 = 8,672.37/x
  3. Step 3: Cross multiply
    13,978.58x = 19,289.34 × 8,672.37
  4. Step 4: Simplify right side
    13,978.58x = 167,284,221.20
  5. Step 5: Solve for x
    x = 167,284,221.20/13,978.58
  6. Step 6: Final answer
    x = 11,967.19

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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.