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Finding the Fourth Proportional to 18,518.76, 25,533.78 and 12,849.18

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Solution

The fourth proportional to 18,518.76, 25,533.78 and 12,849.18 is: 17,716.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.76 : 25,533.78 = 12,849.18 : x
  2. Step 2: Convert to fraction form
    18,518.76/25,533.78 = 12,849.18/x
  3. Step 3: Cross multiply
    18,518.76x = 25,533.78 × 12,849.18
  4. Step 4: Simplify right side
    18,518.76x = 328,088,135.30
  5. Step 5: Solve for x
    x = 328,088,135.30/18,518.76
  6. Step 6: Final answer
    x = 17,716.53

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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.