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Finding the Fourth Proportional to 18,573.90, 25,620.75 and 12,288.30

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Solution

The fourth proportional to 18,573.90, 25,620.75 and 12,288.30 is: 16,950.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,573.90 : 25,620.75 = 12,288.30 : x
  2. Step 2: Convert to fraction form
    18,573.90/25,620.75 = 12,288.30/x
  3. Step 3: Cross multiply
    18,573.90x = 25,620.75 × 12,288.30
  4. Step 4: Simplify right side
    18,573.90x = 314,835,462.23
  5. Step 5: Solve for x
    x = 314,835,462.23/18,573.90
  6. Step 6: Final answer
    x = 16,950.42

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Half scale
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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.