Home / 21,629.60-32,455.20-12,276.80

Finding the Fourth Proportional to 21,629.60, 32,455.20 and 12,276.80

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Solution

The fourth proportional to 21,629.60, 32,455.20 and 12,276.80 is: 18,421.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,629.60 : 32,455.20 = 12,276.80 : x
  2. Step 2: Convert to fraction form
    21,629.60/32,455.20 = 12,276.80/x
  3. Step 3: Cross multiply
    21,629.60x = 32,455.20 × 12,276.80
  4. Step 4: Simplify right side
    21,629.60x = 398,445,999.36
  5. Step 5: Solve for x
    x = 398,445,999.36/21,629.60
  6. Step 6: Final answer
    x = 18,421.33

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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.