Home / 21,420.80-32,131.20-8,273.60

Finding the Fourth Proportional to 21,420.80, 32,131.20 and 8,273.60

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Solution

The fourth proportional to 21,420.80, 32,131.20 and 8,273.60 is: 12,410.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.80 : 32,131.20 = 8,273.60 : x
  2. Step 2: Convert to fraction form
    21,420.80/32,131.20 = 8,273.60/x
  3. Step 3: Cross multiply
    21,420.80x = 32,131.20 × 8,273.60
  4. Step 4: Simplify right side
    21,420.80x = 265,840,696.32
  5. Step 5: Solve for x
    x = 265,840,696.32/21,420.80
  6. Step 6: Final answer
    x = 12,410.40

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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.