Home / 21,420.60-32,121.30-9,727.80

Finding the Fourth Proportional to 21,420.60, 32,121.30 and 9,727.80

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Solution

The fourth proportional to 21,420.60, 32,121.30 and 9,727.80 is: 14,587.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.60 : 32,121.30 = 9,727.80 : x
  2. Step 2: Convert to fraction form
    21,420.60/32,121.30 = 9,727.80/x
  3. Step 3: Cross multiply
    21,420.60x = 32,121.30 × 9,727.80
  4. Step 4: Simplify right side
    21,420.60x = 312,469,582.14
  5. Step 5: Solve for x
    x = 312,469,582.14/21,420.60
  6. Step 6: Final answer
    x = 14,587.34

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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.