Home / 12,210.69-18,318.80-3,891.18

Finding the Fourth Proportional to 12,210.69, 18,318.80 and 3,891.18

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Solution

The fourth proportional to 12,210.69, 18,318.80 and 3,891.18 is: 5,837.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.69 : 18,318.80 = 3,891.18 : x
  2. Step 2: Convert to fraction form
    12,210.69/18,318.80 = 3,891.18/x
  3. Step 3: Cross multiply
    12,210.69x = 18,318.80 × 3,891.18
  4. Step 4: Simplify right side
    12,210.69x = 71,281,748.18
  5. Step 5: Solve for x
    x = 71,281,748.18/12,210.69
  6. Step 6: Final answer
    x = 5,837.65

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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.