Home / 15,739.66-21,720.60-8,665.93

Finding the Fourth Proportional to 15,739.66, 21,720.60 and 8,665.93

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Solution

The fourth proportional to 15,739.66, 21,720.60 and 8,665.93 is: 11,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.66 : 21,720.60 = 8,665.93 : x
  2. Step 2: Convert to fraction form
    15,739.66/21,720.60 = 8,665.93/x
  3. Step 3: Cross multiply
    15,739.66x = 21,720.60 × 8,665.93
  4. Step 4: Simplify right side
    15,739.66x = 188,229,199.16
  5. Step 5: Solve for x
    x = 188,229,199.16/15,739.66
  6. Step 6: Final answer
    x = 11,958.91

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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.