Home / 13,161.87-18,162.84-7,193.61

Finding the Fourth Proportional to 13,161.87, 18,162.84 and 7,193.61

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Solution

The fourth proportional to 13,161.87, 18,162.84 and 7,193.61 is: 9,926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.87 : 18,162.84 = 7,193.61 : x
  2. Step 2: Convert to fraction form
    13,161.87/18,162.84 = 7,193.61/x
  3. Step 3: Cross multiply
    13,161.87x = 18,162.84 × 7,193.61
  4. Step 4: Simplify right side
    13,161.87x = 130,656,387.45
  5. Step 5: Solve for x
    x = 130,656,387.45/13,161.87
  6. Step 6: Final answer
    x = 9,926.89

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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.