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Finding the Fourth Proportional to 19,215.21, 28,821.64 and 7,204.99

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Solution

The fourth proportional to 19,215.21, 28,821.64 and 7,204.99 is: 10,807.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.21 : 28,821.64 = 7,204.99 : x
  2. Step 2: Convert to fraction form
    19,215.21/28,821.64 = 7,204.99/x
  3. Step 3: Cross multiply
    19,215.21x = 28,821.64 × 7,204.99
  4. Step 4: Simplify right side
    19,215.21x = 207,659,447.85
  5. Step 5: Solve for x
    x = 207,659,447.85/19,215.21
  6. Step 6: Final answer
    x = 10,807.04

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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.