Home / 21,108.95-29,128.62-11,677.52

Finding the Fourth Proportional to 21,108.95, 29,128.62 and 11,677.52

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Solution

The fourth proportional to 21,108.95, 29,128.62 and 11,677.52 is: 16,114.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.95 : 29,128.62 = 11,677.52 : x
  2. Step 2: Convert to fraction form
    21,108.95/29,128.62 = 11,677.52/x
  3. Step 3: Cross multiply
    21,108.95x = 29,128.62 × 11,677.52
  4. Step 4: Simplify right side
    21,108.95x = 340,150,042.62
  5. Step 5: Solve for x
    x = 340,150,042.62/21,108.95
  6. Step 6: Final answer
    x = 16,114.02

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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.