Home / 21,161.60-29,200.80-11,729.92

Finding the Fourth Proportional to 21,161.60, 29,200.80 and 11,729.92

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Solution

The fourth proportional to 21,161.60, 29,200.80 and 11,729.92 is: 16,186.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.60 : 29,200.80 = 11,729.92 : x
  2. Step 2: Convert to fraction form
    21,161.60/29,200.80 = 11,729.92/x
  3. Step 3: Cross multiply
    21,161.60x = 29,200.80 × 11,729.92
  4. Step 4: Simplify right side
    21,161.60x = 342,523,047.94
  5. Step 5: Solve for x
    x = 342,523,047.94/21,161.60
  6. Step 6: Final answer
    x = 16,186.07

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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.