Home / 15,739.32-21,720.08-8,665.60

Finding the Fourth Proportional to 15,739.32, 21,720.08 and 8,665.60

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Solution

The fourth proportional to 15,739.32, 21,720.08 and 8,665.60 is: 11,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.32 : 21,720.08 = 8,665.60 : x
  2. Step 2: Convert to fraction form
    15,739.32/21,720.08 = 8,665.60/x
  3. Step 3: Cross multiply
    15,739.32x = 21,720.08 × 8,665.60
  4. Step 4: Simplify right side
    15,739.32x = 188,217,525.25
  5. Step 5: Solve for x
    x = 188,217,525.25/15,739.32
  6. Step 6: Final answer
    x = 11,958.43

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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.