Home / 21,108.68-29,128.77-11,676.63

Finding the Fourth Proportional to 21,108.68, 29,128.77 and 11,676.63

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Solution

The fourth proportional to 21,108.68, 29,128.77 and 11,676.63 is: 16,113.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.68 : 29,128.77 = 11,676.63 : x
  2. Step 2: Convert to fraction form
    21,108.68/29,128.77 = 11,676.63/x
  3. Step 3: Cross multiply
    21,108.68x = 29,128.77 × 11,676.63
  4. Step 4: Simplify right side
    21,108.68x = 340,125,869.65
  5. Step 5: Solve for x
    x = 340,125,869.65/21,108.68
  6. Step 6: Final answer
    x = 16,113.08

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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.