Home / 15,739.52-21,720.96-8,665.92

Finding the Fourth Proportional to 15,739.52, 21,720.96 and 8,665.92

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Solution

The fourth proportional to 15,739.52, 21,720.96 and 8,665.92 is: 11,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.52 : 21,720.96 = 8,665.92 : x
  2. Step 2: Convert to fraction form
    15,739.52/21,720.96 = 8,665.92/x
  3. Step 3: Cross multiply
    15,739.52x = 21,720.96 × 8,665.92
  4. Step 4: Simplify right side
    15,739.52x = 188,232,101.68
  5. Step 5: Solve for x
    x = 188,232,101.68/15,739.52
  6. Step 6: Final answer
    x = 11,959.20

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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.