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Finding the Fourth Proportional to 19,078.44, 28,539.84 and 15,384.84

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Solution

The fourth proportional to 19,078.44, 28,539.84 and 15,384.84 is: 23,014.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.44 : 28,539.84 = 15,384.84 : x
  2. Step 2: Convert to fraction form
    19,078.44/28,539.84 = 15,384.84/x
  3. Step 3: Cross multiply
    19,078.44x = 28,539.84 × 15,384.84
  4. Step 4: Simplify right side
    19,078.44x = 439,080,872.03
  5. Step 5: Solve for x
    x = 439,080,872.03/19,078.44
  6. Step 6: Final answer
    x = 23,014.51

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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.