Home / 21,861.80-30,168.62-12,302.22

Finding the Fourth Proportional to 21,861.80, 30,168.62 and 12,302.22

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Solution

The fourth proportional to 21,861.80, 30,168.62 and 12,302.22 is: 16,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,861.80 : 30,168.62 = 12,302.22 : x
  2. Step 2: Convert to fraction form
    21,861.80/30,168.62 = 12,302.22/x
  3. Step 3: Cross multiply
    21,861.80x = 30,168.62 × 12,302.22
  4. Step 4: Simplify right side
    21,861.80x = 371,141,000.34
  5. Step 5: Solve for x
    x = 371,141,000.34/21,861.80
  6. Step 6: Final answer
    x = 16,976.69

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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.