Home / 21,222.18-31,832.28-8,739.12

Finding the Fourth Proportional to 21,222.18, 31,832.28 and 8,739.12

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Solution

The fourth proportional to 21,222.18, 31,832.28 and 8,739.12 is: 13,108.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.18 : 31,832.28 = 8,739.12 : x
  2. Step 2: Convert to fraction form
    21,222.18/31,832.28 = 8,739.12/x
  3. Step 3: Cross multiply
    21,222.18x = 31,832.28 × 8,739.12
  4. Step 4: Simplify right side
    21,222.18x = 278,186,114.79
  5. Step 5: Solve for x
    x = 278,186,114.79/21,222.18
  6. Step 6: Final answer
    x = 13,108.27

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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.