Home / 15,709.22-21,679.14-8,539.62

Finding the Fourth Proportional to 15,709.22, 21,679.14 and 8,539.62

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Solution

The fourth proportional to 15,709.22, 21,679.14 and 8,539.62 is: 11,784.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.22 : 21,679.14 = 8,539.62 : x
  2. Step 2: Convert to fraction form
    15,709.22/21,679.14 = 8,539.62/x
  3. Step 3: Cross multiply
    15,709.22x = 21,679.14 × 8,539.62
  4. Step 4: Simplify right side
    15,709.22x = 185,131,487.37
  5. Step 5: Solve for x
    x = 185,131,487.37/15,709.22
  6. Step 6: Final answer
    x = 11,784.90

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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.