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Finding the Fourth Proportional to 18,659.69, 25,742.05 and 12,607.98

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Solution

The fourth proportional to 18,659.69, 25,742.05 and 12,607.98 is: 17,393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.69 : 25,742.05 = 12,607.98 : x
  2. Step 2: Convert to fraction form
    18,659.69/25,742.05 = 12,607.98/x
  3. Step 3: Cross multiply
    18,659.69x = 25,742.05 × 12,607.98
  4. Step 4: Simplify right side
    18,659.69x = 324,555,188.52
  5. Step 5: Solve for x
    x = 324,555,188.52/18,659.69
  6. Step 6: Final answer
    x = 17,393.39

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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.