Home / 12,429.10-18,589.65-11,122.30

Finding the Fourth Proportional to 12,429.10, 18,589.65 and 11,122.30

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Solution

The fourth proportional to 12,429.10, 18,589.65 and 11,122.30 is: 16,635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.10 : 18,589.65 = 11,122.30 : x
  2. Step 2: Convert to fraction form
    12,429.10/18,589.65 = 11,122.30/x
  3. Step 3: Cross multiply
    12,429.10x = 18,589.65 × 11,122.30
  4. Step 4: Simplify right side
    12,429.10x = 206,759,664.20
  5. Step 5: Solve for x
    x = 206,759,664.20/12,429.10
  6. Step 6: Final answer
    x = 16,635.13

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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.