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Finding the Fourth Proportional to 16,821.20, 25,231.80 and 16,529.60

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Solution

The fourth proportional to 16,821.20, 25,231.80 and 16,529.60 is: 24,794.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821.20 : 25,231.80 = 16,529.60 : x
  2. Step 2: Convert to fraction form
    16,821.20/25,231.80 = 16,529.60/x
  3. Step 3: Cross multiply
    16,821.20x = 25,231.80 × 16,529.60
  4. Step 4: Simplify right side
    16,821.20x = 417,071,561.28
  5. Step 5: Solve for x
    x = 417,071,561.28/16,821.20
  6. Step 6: Final answer
    x = 24,794.40

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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.