Home / 21,376.84-29,499.54-12,879.88

Finding the Fourth Proportional to 21,376.84, 29,499.54 and 12,879.88

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Solution

The fourth proportional to 21,376.84, 29,499.54 and 12,879.88 is: 17,773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.84 : 29,499.54 = 12,879.88 : x
  2. Step 2: Convert to fraction form
    21,376.84/29,499.54 = 12,879.88/x
  3. Step 3: Cross multiply
    21,376.84x = 29,499.54 × 12,879.88
  4. Step 4: Simplify right side
    21,376.84x = 379,950,535.26
  5. Step 5: Solve for x
    x = 379,950,535.26/21,376.84
  6. Step 6: Final answer
    x = 17,773.93

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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.