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Finding the Fourth Proportional to 13,661.64, 20,492.52 and 4,899.12

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Solution

The fourth proportional to 13,661.64, 20,492.52 and 4,899.12 is: 7,348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.64 : 20,492.52 = 4,899.12 : x
  2. Step 2: Convert to fraction form
    13,661.64/20,492.52 = 4,899.12/x
  3. Step 3: Cross multiply
    13,661.64x = 20,492.52 × 4,899.12
  4. Step 4: Simplify right side
    13,661.64x = 100,395,314.58
  5. Step 5: Solve for x
    x = 100,395,314.58/13,661.64
  6. Step 6: Final answer
    x = 7,348.70

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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.