Home / 12,618.90-17,287.97-12,145.97

Finding the Fourth Proportional to 12,618.90, 17,287.97 and 12,145.97

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Solution

The fourth proportional to 12,618.90, 17,287.97 and 12,145.97 is: 16,640.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.90 : 17,287.97 = 12,145.97 : x
  2. Step 2: Convert to fraction form
    12,618.90/17,287.97 = 12,145.97/x
  3. Step 3: Cross multiply
    12,618.90x = 17,287.97 × 12,145.97
  4. Step 4: Simplify right side
    12,618.90x = 209,979,017.81
  5. Step 5: Solve for x
    x = 209,979,017.81/12,618.90
  6. Step 6: Final answer
    x = 16,640.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.