Home / 21,380.77-29,502.90-11,819.37

Finding the Fourth Proportional to 21,380.77, 29,502.90 and 11,819.37

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Solution

The fourth proportional to 21,380.77, 29,502.90 and 11,819.37 is: 16,309.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.77 : 29,502.90 = 11,819.37 : x
  2. Step 2: Convert to fraction form
    21,380.77/29,502.90 = 11,819.37/x
  3. Step 3: Cross multiply
    21,380.77x = 29,502.90 × 11,819.37
  4. Step 4: Simplify right side
    21,380.77x = 348,705,624.86
  5. Step 5: Solve for x
    x = 348,705,624.86/21,380.77
  6. Step 6: Final answer
    x = 16,309.31

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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.