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Finding the Fourth Proportional to 18,191.61, 27,243.64 and 12,330.45

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Solution

The fourth proportional to 18,191.61, 27,243.64 and 12,330.45 is: 18,466.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191.61 : 27,243.64 = 12,330.45 : x
  2. Step 2: Convert to fraction form
    18,191.61/27,243.64 = 12,330.45/x
  3. Step 3: Cross multiply
    18,191.61x = 27,243.64 × 12,330.45
  4. Step 4: Simplify right side
    18,191.61x = 335,926,340.84
  5. Step 5: Solve for x
    x = 335,926,340.84/18,191.61
  6. Step 6: Final answer
    x = 18,466.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.