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Finding the Fourth Proportional to 18,818.48, 25,969.64 and 12,849.99

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Solution

The fourth proportional to 18,818.48, 25,969.64 and 12,849.99 is: 17,733.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.48 : 25,969.64 = 12,849.99 : x
  2. Step 2: Convert to fraction form
    18,818.48/25,969.64 = 12,849.99/x
  3. Step 3: Cross multiply
    18,818.48x = 25,969.64 × 12,849.99
  4. Step 4: Simplify right side
    18,818.48x = 333,709,550.05
  5. Step 5: Solve for x
    x = 333,709,550.05/18,818.48
  6. Step 6: Final answer
    x = 17,733.08

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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.