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Finding the Fourth Proportional to 18,768.95, 25,910.53 and 10,809.64

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Solution

The fourth proportional to 18,768.95, 25,910.53 and 10,809.64 is: 14,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.95 : 25,910.53 = 10,809.64 : x
  2. Step 2: Convert to fraction form
    18,768.95/25,910.53 = 10,809.64/x
  3. Step 3: Cross multiply
    18,768.95x = 25,910.53 × 10,809.64
  4. Step 4: Simplify right side
    18,768.95x = 280,083,501.51
  5. Step 5: Solve for x
    x = 280,083,501.51/18,768.95
  6. Step 6: Final answer
    x = 14,922.70

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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.