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Finding the Fourth Proportional to 13,371.50, 18,451.95 and 7,402.88

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Solution

The fourth proportional to 13,371.50, 18,451.95 and 7,402.88 is: 10,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,371.50 : 18,451.95 = 7,402.88 : x
  2. Step 2: Convert to fraction form
    13,371.50/18,451.95 = 7,402.88/x
  3. Step 3: Cross multiply
    13,371.50x = 18,451.95 × 7,402.88
  4. Step 4: Simplify right side
    13,371.50x = 136,597,571.62
  5. Step 5: Solve for x
    x = 136,597,571.62/13,371.50
  6. Step 6: Final answer
    x = 10,215.58

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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.