Home / 21,131.76-29,161.86-11,701.74

Finding the Fourth Proportional to 21,131.76, 29,161.86 and 11,701.74

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Solution

The fourth proportional to 21,131.76, 29,161.86 and 11,701.74 is: 16,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.76 : 29,161.86 = 11,701.74 : x
  2. Step 2: Convert to fraction form
    21,131.76/29,161.86 = 11,701.74/x
  3. Step 3: Cross multiply
    21,131.76x = 29,161.86 × 11,701.74
  4. Step 4: Simplify right side
    21,131.76x = 341,244,503.64
  5. Step 5: Solve for x
    x = 341,244,503.64/21,131.76
  6. Step 6: Final answer
    x = 16,148.42

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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.