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Finding the Fourth Proportional to 18,118.84, 24,995.50 and 12,816.58

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Solution

The fourth proportional to 18,118.84, 24,995.50 and 12,816.58 is: 17,680.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.84 : 24,995.50 = 12,816.58 : x
  2. Step 2: Convert to fraction form
    18,118.84/24,995.50 = 12,816.58/x
  3. Step 3: Cross multiply
    18,118.84x = 24,995.50 × 12,816.58
  4. Step 4: Simplify right side
    18,118.84x = 320,356,825.39
  5. Step 5: Solve for x
    x = 320,356,825.39/18,118.84
  6. Step 6: Final answer
    x = 17,680.87

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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.