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Finding the Fourth Proportional to 18,818.89, 25,904.89 and 16,265.49

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Solution

The fourth proportional to 18,818.89, 25,904.89 and 16,265.49 is: 22,390.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.89 : 25,904.89 = 16,265.49 : x
  2. Step 2: Convert to fraction form
    18,818.89/25,904.89 = 16,265.49/x
  3. Step 3: Cross multiply
    18,818.89x = 25,904.89 × 16,265.49
  4. Step 4: Simplify right side
    18,818.89x = 421,355,559.06
  5. Step 5: Solve for x
    x = 421,355,559.06/18,818.89
  6. Step 6: Final answer
    x = 22,390.03

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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.