Home / 21,619.63-29,835.17-12,188.35

Finding the Fourth Proportional to 21,619.63, 29,835.17 and 12,188.35

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Solution

The fourth proportional to 21,619.63, 29,835.17 and 12,188.35 is: 16,819.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.63 : 29,835.17 = 12,188.35 : x
  2. Step 2: Convert to fraction form
    21,619.63/29,835.17 = 12,188.35/x
  3. Step 3: Cross multiply
    21,619.63x = 29,835.17 × 12,188.35
  4. Step 4: Simplify right side
    21,619.63x = 363,641,494.27
  5. Step 5: Solve for x
    x = 363,641,494.27/21,619.63
  6. Step 6: Final answer
    x = 16,819.97

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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.