Home / 21,105.77-29,124.68-11,543.85

Finding the Fourth Proportional to 21,105.77, 29,124.68 and 11,543.85

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Solution

The fourth proportional to 21,105.77, 29,124.68 and 11,543.85 is: 15,929.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.77 : 29,124.68 = 11,543.85 : x
  2. Step 2: Convert to fraction form
    21,105.77/29,124.68 = 11,543.85/x
  3. Step 3: Cross multiply
    21,105.77x = 29,124.68 × 11,543.85
  4. Step 4: Simplify right side
    21,105.77x = 336,210,879.50
  5. Step 5: Solve for x
    x = 336,210,879.50/21,105.77
  6. Step 6: Final answer
    x = 15,929.81

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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.