Home / 15,739.44-21,720.90-8,666.28

Finding the Fourth Proportional to 15,739.44, 21,720.90 and 8,666.28

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Solution

The fourth proportional to 15,739.44, 21,720.90 and 8,666.28 is: 11,959.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.44 : 21,720.90 = 8,666.28 : x
  2. Step 2: Convert to fraction form
    15,739.44/21,720.90 = 8,666.28/x
  3. Step 3: Cross multiply
    15,739.44x = 21,720.90 × 8,666.28
  4. Step 4: Simplify right side
    15,739.44x = 188,239,401.25
  5. Step 5: Solve for x
    x = 188,239,401.25/15,739.44
  6. Step 6: Final answer
    x = 11,959.73

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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.