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Finding the Fourth Proportional to 18,259.94, 25,214.10 and 12,311.30

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Solution

The fourth proportional to 18,259.94, 25,214.10 and 12,311.30 is: 16,999.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,259.94 : 25,214.10 = 12,311.30 : x
  2. Step 2: Convert to fraction form
    18,259.94/25,214.10 = 12,311.30/x
  3. Step 3: Cross multiply
    18,259.94x = 25,214.10 × 12,311.30
  4. Step 4: Simplify right side
    18,259.94x = 310,418,349.33
  5. Step 5: Solve for x
    x = 310,418,349.33/18,259.94
  6. Step 6: Final answer
    x = 16,999.97

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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.