Home / 15,739.08-21,719.90-8,665.50

Finding the Fourth Proportional to 15,739.08, 21,719.90 and 8,665.50

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Solution

The fourth proportional to 15,739.08, 21,719.90 and 8,665.50 is: 11,958.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.08 : 21,719.90 = 8,665.50 : x
  2. Step 2: Convert to fraction form
    15,739.08/21,719.90 = 8,665.50/x
  3. Step 3: Cross multiply
    15,739.08x = 21,719.90 × 8,665.50
  4. Step 4: Simplify right side
    15,739.08x = 188,213,793.45
  5. Step 5: Solve for x
    x = 188,213,793.45/15,739.08
  6. Step 6: Final answer
    x = 11,958.37

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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.