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Finding the Fourth Proportional to 13,661.40, 20,492.10 and 3,800.68

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Solution

The fourth proportional to 13,661.40, 20,492.10 and 3,800.68 is: 5,701.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.40 : 20,492.10 = 3,800.68 : x
  2. Step 2: Convert to fraction form
    13,661.40/20,492.10 = 3,800.68/x
  3. Step 3: Cross multiply
    13,661.40x = 20,492.10 × 3,800.68
  4. Step 4: Simplify right side
    13,661.40x = 77,883,914.63
  5. Step 5: Solve for x
    x = 77,883,914.63/13,661.40
  6. Step 6: Final answer
    x = 5,701.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.