Home / 21,186.96-31,782.60-7,332.72

Finding the Fourth Proportional to 21,186.96, 31,782.60 and 7,332.72

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Solution

The fourth proportional to 21,186.96, 31,782.60 and 7,332.72 is: 10,999.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.96 : 31,782.60 = 7,332.72 : x
  2. Step 2: Convert to fraction form
    21,186.96/31,782.60 = 7,332.72/x
  3. Step 3: Cross multiply
    21,186.96x = 31,782.60 × 7,332.72
  4. Step 4: Simplify right side
    21,186.96x = 233,052,906.67
  5. Step 5: Solve for x
    x = 233,052,906.67/21,186.96
  6. Step 6: Final answer
    x = 10,999.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.