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Finding the Fourth Proportional to 18,390.99, 25,375.69 and 12,026.91

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Solution

The fourth proportional to 18,390.99, 25,375.69 and 12,026.91 is: 16,594.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.99 : 25,375.69 = 12,026.91 : x
  2. Step 2: Convert to fraction form
    18,390.99/25,375.69 = 12,026.91/x
  3. Step 3: Cross multiply
    18,390.99x = 25,375.69 × 12,026.91
  4. Step 4: Simplify right side
    18,390.99x = 305,191,139.82
  5. Step 5: Solve for x
    x = 305,191,139.82/18,390.99
  6. Step 6: Final answer
    x = 16,594.60

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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.