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Finding the Fourth Proportional to 13,219.79, 18,243.42 and 7,251.41

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Solution

The fourth proportional to 13,219.79, 18,243.42 and 7,251.41 is: 10,007.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.79 : 18,243.42 = 7,251.41 : x
  2. Step 2: Convert to fraction form
    13,219.79/18,243.42 = 7,251.41/x
  3. Step 3: Cross multiply
    13,219.79x = 18,243.42 × 7,251.41
  4. Step 4: Simplify right side
    13,219.79x = 132,290,518.22
  5. Step 5: Solve for x
    x = 132,290,518.22/13,219.79
  6. Step 6: Final answer
    x = 10,007.01

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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.