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Finding the Fourth Proportional to 13,646.60, 20,469.90 and 4,881.80

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Solution

The fourth proportional to 13,646.60, 20,469.90 and 4,881.80 is: 7,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,646.60 : 20,469.90 = 4,881.80 : x
  2. Step 2: Convert to fraction form
    13,646.60/20,469.90 = 4,881.80/x
  3. Step 3: Cross multiply
    13,646.60x = 20,469.90 × 4,881.80
  4. Step 4: Simplify right side
    13,646.60x = 99,929,957.82
  5. Step 5: Solve for x
    x = 99,929,957.82/13,646.60
  6. Step 6: Final answer
    x = 7,322.70

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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.