Home / 30,110.24-41,508.80-21,129.92

Finding the Fourth Proportional to 30,110.24, 41,508.80 and 21,129.92

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Solution

The fourth proportional to 30,110.24, 41,508.80 and 21,129.92 is: 29,128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,110.24 : 41,508.80 = 21,129.92 : x
  2. Step 2: Convert to fraction form
    30,110.24/41,508.80 = 21,129.92/x
  3. Step 3: Cross multiply
    30,110.24x = 41,508.80 × 21,129.92
  4. Step 4: Simplify right side
    30,110.24x = 877,077,623.30
  5. Step 5: Solve for x
    x = 877,077,623.30/30,110.24
  6. Step 6: Final answer
    x = 29,128.88

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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.