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Finding the Fourth Proportional to 12,431.79, 17,133.03 and 11,642.67

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Solution

The fourth proportional to 12,431.79, 17,133.03 and 11,642.67 is: 16,045.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.79 : 17,133.03 = 11,642.67 : x
  2. Step 2: Convert to fraction form
    12,431.79/17,133.03 = 11,642.67/x
  3. Step 3: Cross multiply
    12,431.79x = 17,133.03 × 11,642.67
  4. Step 4: Simplify right side
    12,431.79x = 199,474,214.39
  5. Step 5: Solve for x
    x = 199,474,214.39/12,431.79
  6. Step 6: Final answer
    x = 16,045.49

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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.