Home / 21,171.14-29,215.91-12,218.45

Finding the Fourth Proportional to 21,171.14, 29,215.91 and 12,218.45

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Solution

The fourth proportional to 21,171.14, 29,215.91 and 12,218.45 is: 16,861.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.14 : 29,215.91 = 12,218.45 : x
  2. Step 2: Convert to fraction form
    21,171.14/29,215.91 = 12,218.45/x
  3. Step 3: Cross multiply
    21,171.14x = 29,215.91 × 12,218.45
  4. Step 4: Simplify right side
    21,171.14x = 356,972,928.37
  5. Step 5: Solve for x
    x = 356,972,928.37/21,171.14
  6. Step 6: Final answer
    x = 16,861.30

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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.