Home / 10,221.12-15,332.69-3,981.62

Finding the Fourth Proportional to 10,221.12, 15,332.69 and 3,981.62

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Solution

The fourth proportional to 10,221.12, 15,332.69 and 3,981.62 is: 5,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.12 : 15,332.69 = 3,981.62 : x
  2. Step 2: Convert to fraction form
    10,221.12/15,332.69 = 3,981.62/x
  3. Step 3: Cross multiply
    10,221.12x = 15,332.69 × 3,981.62
  4. Step 4: Simplify right side
    10,221.12x = 61,048,993.44
  5. Step 5: Solve for x
    x = 61,048,993.44/10,221.12
  6. Step 6: Final answer
    x = 5,972.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.