Home / 21,021.12-29,006.79-11,587.86

Finding the Fourth Proportional to 21,021.12, 29,006.79 and 11,587.86

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Solution

The fourth proportional to 21,021.12, 29,006.79 and 11,587.86 is: 15,989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.12 : 29,006.79 = 11,587.86 : x
  2. Step 2: Convert to fraction form
    21,021.12/29,006.79 = 11,587.86/x
  3. Step 3: Cross multiply
    21,021.12x = 29,006.79 × 11,587.86
  4. Step 4: Simplify right side
    21,021.12x = 336,126,621.57
  5. Step 5: Solve for x
    x = 336,126,621.57/21,021.12
  6. Step 6: Final answer
    x = 15,989.95

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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.