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Finding the Fourth Proportional to 18,468.31, 25,470.19 and 12,005.21

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Solution

The fourth proportional to 18,468.31, 25,470.19 and 12,005.21 is: 16,556.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,468.31 : 25,470.19 = 12,005.21 : x
  2. Step 2: Convert to fraction form
    18,468.31/25,470.19 = 12,005.21/x
  3. Step 3: Cross multiply
    18,468.31x = 25,470.19 × 12,005.21
  4. Step 4: Simplify right side
    18,468.31x = 305,774,919.66
  5. Step 5: Solve for x
    x = 305,774,919.66/18,468.31
  6. Step 6: Final answer
    x = 16,556.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.