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Finding the Fourth Proportional to 13,651.60, 20,477.40 and 4,886.80

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Solution

The fourth proportional to 13,651.60, 20,477.40 and 4,886.80 is: 7,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.60 : 20,477.40 = 4,886.80 : x
  2. Step 2: Convert to fraction form
    13,651.60/20,477.40 = 4,886.80/x
  3. Step 3: Cross multiply
    13,651.60x = 20,477.40 × 4,886.80
  4. Step 4: Simplify right side
    13,651.60x = 100,068,958.32
  5. Step 5: Solve for x
    x = 100,068,958.32/13,651.60
  6. Step 6: Final answer
    x = 7,330.20

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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.