Home / 12,439.99-18,660-3,681.05

Finding the Fourth Proportional to 12,439.99, 18,660 and 3,681.05

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Solution

The fourth proportional to 12,439.99, 18,660 and 3,681.05 is: 5,521.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.99 : 18,660 = 3,681.05 : x
  2. Step 2: Convert to fraction form
    12,439.99/18,660 = 3,681.05/x
  3. Step 3: Cross multiply
    12,439.99x = 18,660 × 3,681.05
  4. Step 4: Simplify right side
    12,439.99x = 68,688,393
  5. Step 5: Solve for x
    x = 68,688,393/12,439.99
  6. Step 6: Final answer
    x = 5,521.58

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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.