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Finding the Fourth Proportional to 13,808.70, 18,923.22 and 12,480.06

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Solution

The fourth proportional to 13,808.70, 18,923.22 and 12,480.06 is: 17,102.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.70 : 18,923.22 = 12,480.06 : x
  2. Step 2: Convert to fraction form
    13,808.70/18,923.22 = 12,480.06/x
  3. Step 3: Cross multiply
    13,808.70x = 18,923.22 × 12,480.06
  4. Step 4: Simplify right side
    13,808.70x = 236,162,920.99
  5. Step 5: Solve for x
    x = 236,162,920.99/13,808.70
  6. Step 6: Final answer
    x = 17,102.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.