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Finding the Fourth Proportional to 13,205.05, 18,222.95 and 7,901.12

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Solution

The fourth proportional to 13,205.05, 18,222.95 and 7,901.12 is: 10,903.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.05 : 18,222.95 = 7,901.12 : x
  2. Step 2: Convert to fraction form
    13,205.05/18,222.95 = 7,901.12/x
  3. Step 3: Cross multiply
    13,205.05x = 18,222.95 × 7,901.12
  4. Step 4: Simplify right side
    13,205.05x = 143,981,780.01
  5. Step 5: Solve for x
    x = 143,981,780.01/13,205.05
  6. Step 6: Final answer
    x = 10,903.54

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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.