Home / 21,186.55-31,774.49-8,710.05

Finding the Fourth Proportional to 21,186.55, 31,774.49 and 8,710.05

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Solution

The fourth proportional to 21,186.55, 31,774.49 and 8,710.05 is: 13,062.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.55 : 31,774.49 = 8,710.05 : x
  2. Step 2: Convert to fraction form
    21,186.55/31,774.49 = 8,710.05/x
  3. Step 3: Cross multiply
    21,186.55x = 31,774.49 × 8,710.05
  4. Step 4: Simplify right side
    21,186.55x = 276,757,396.62
  5. Step 5: Solve for x
    x = 276,757,396.62/21,186.55
  6. Step 6: Final answer
    x = 13,062.88

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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.