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Finding the Fourth Proportional to 12,656.67, 18,984.96 and 3,422.67

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Solution

The fourth proportional to 12,656.67, 18,984.96 and 3,422.67 is: 5,133.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.67 : 18,984.96 = 3,422.67 : x
  2. Step 2: Convert to fraction form
    12,656.67/18,984.96 = 3,422.67/x
  3. Step 3: Cross multiply
    12,656.67x = 18,984.96 × 3,422.67
  4. Step 4: Simplify right side
    12,656.67x = 64,979,253.04
  5. Step 5: Solve for x
    x = 64,979,253.04/12,656.67
  6. Step 6: Final answer
    x = 5,133.99

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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.