Home / 21,105.20-29,125.32-11,674.28

Finding the Fourth Proportional to 21,105.20, 29,125.32 and 11,674.28

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Solution

The fourth proportional to 21,105.20, 29,125.32 and 11,674.28 is: 16,110.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.20 : 29,125.32 = 11,674.28 : x
  2. Step 2: Convert to fraction form
    21,105.20/29,125.32 = 11,674.28/x
  3. Step 3: Cross multiply
    21,105.20x = 29,125.32 × 11,674.28
  4. Step 4: Simplify right side
    21,105.20x = 340,017,140.77
  5. Step 5: Solve for x
    x = 340,017,140.77/21,105.20
  6. Step 6: Final answer
    x = 16,110.59

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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.