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Finding the Fourth Proportional to 13,047.01, 18,000.61 and 7,381.21

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Solution

The fourth proportional to 13,047.01, 18,000.61 and 7,381.21 is: 10,183.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,047.01 : 18,000.61 = 7,381.21 : x
  2. Step 2: Convert to fraction form
    13,047.01/18,000.61 = 7,381.21/x
  3. Step 3: Cross multiply
    13,047.01x = 18,000.61 × 7,381.21
  4. Step 4: Simplify right side
    13,047.01x = 132,866,282.54
  5. Step 5: Solve for x
    x = 132,866,282.54/13,047.01
  6. Step 6: Final answer
    x = 10,183.66

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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.