Home / 21,161.71-29,204.13-11,729.67

Finding the Fourth Proportional to 21,161.71, 29,204.13 and 11,729.67

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Solution

The fourth proportional to 21,161.71, 29,204.13 and 11,729.67 is: 16,187.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.71 : 29,204.13 = 11,729.67 : x
  2. Step 2: Convert to fraction form
    21,161.71/29,204.13 = 11,729.67/x
  3. Step 3: Cross multiply
    21,161.71x = 29,204.13 × 11,729.67
  4. Step 4: Simplify right side
    21,161.71x = 342,554,807.54
  5. Step 5: Solve for x
    x = 342,554,807.54/21,161.71
  6. Step 6: Final answer
    x = 16,187.48

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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.