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Finding the Fourth Proportional to 18,257.94, 25,211.34 and 12,309.30

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Solution

The fourth proportional to 18,257.94, 25,211.34 and 12,309.30 is: 16,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,257.94 : 25,211.34 = 12,309.30 : x
  2. Step 2: Convert to fraction form
    18,257.94/25,211.34 = 12,309.30/x
  3. Step 3: Cross multiply
    18,257.94x = 25,211.34 × 12,309.30
  4. Step 4: Simplify right side
    18,257.94x = 310,333,947.46
  5. Step 5: Solve for x
    x = 310,333,947.46/18,257.94
  6. Step 6: Final answer
    x = 16,997.20

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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.