Home / 21,192.50-29,245.39-12,117.80

Finding the Fourth Proportional to 21,192.50, 29,245.39 and 12,117.80

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Solution

The fourth proportional to 21,192.50, 29,245.39 and 12,117.80 is: 16,722.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,192.50 : 29,245.39 = 12,117.80 : x
  2. Step 2: Convert to fraction form
    21,192.50/29,245.39 = 12,117.80/x
  3. Step 3: Cross multiply
    21,192.50x = 29,245.39 × 12,117.80
  4. Step 4: Simplify right side
    21,192.50x = 354,389,829.76
  5. Step 5: Solve for x
    x = 354,389,829.76/21,192.50
  6. Step 6: Final answer
    x = 16,722.42

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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.