Home / 21,231.85-31,846.62-8,751.64

Finding the Fourth Proportional to 21,231.85, 31,846.62 and 8,751.64

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Solution

The fourth proportional to 21,231.85, 31,846.62 and 8,751.64 is: 13,126.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.85 : 31,846.62 = 8,751.64 : x
  2. Step 2: Convert to fraction form
    21,231.85/31,846.62 = 8,751.64/x
  3. Step 3: Cross multiply
    21,231.85x = 31,846.62 × 8,751.64
  4. Step 4: Simplify right side
    21,231.85x = 278,710,153.46
  5. Step 5: Solve for x
    x = 278,710,153.46/21,231.85
  6. Step 6: Final answer
    x = 13,126.98

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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.