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Finding the Fourth Proportional to 19,009.47, 28,489.55 and 8,464.49

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Solution

The fourth proportional to 19,009.47, 28,489.55 and 8,464.49 is: 12,685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.47 : 28,489.55 = 8,464.49 : x
  2. Step 2: Convert to fraction form
    19,009.47/28,489.55 = 8,464.49/x
  3. Step 3: Cross multiply
    19,009.47x = 28,489.55 × 8,464.49
  4. Step 4: Simplify right side
    19,009.47x = 241,149,326.31
  5. Step 5: Solve for x
    x = 241,149,326.31/19,009.47
  6. Step 6: Final answer
    x = 12,685.75

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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.