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Finding the Fourth Proportional to 12,298.65, 18,449.99 and 3,980.76

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Solution

The fourth proportional to 12,298.65, 18,449.99 and 3,980.76 is: 5,971.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,298.65 : 18,449.99 = 3,980.76 : x
  2. Step 2: Convert to fraction form
    12,298.65/18,449.99 = 3,980.76/x
  3. Step 3: Cross multiply
    12,298.65x = 18,449.99 × 3,980.76
  4. Step 4: Simplify right side
    12,298.65x = 73,444,982.19
  5. Step 5: Solve for x
    x = 73,444,982.19/12,298.65
  6. Step 6: Final answer
    x = 5,971.79

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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.