Home / 13,139.09-19,612.83-11,478.33

Finding the Fourth Proportional to 13,139.09, 19,612.83 and 11,478.33

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Solution

The fourth proportional to 13,139.09, 19,612.83 and 11,478.33 is: 17,133.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.09 : 19,612.83 = 11,478.33 : x
  2. Step 2: Convert to fraction form
    13,139.09/19,612.83 = 11,478.33/x
  3. Step 3: Cross multiply
    13,139.09x = 19,612.83 × 11,478.33
  4. Step 4: Simplify right side
    13,139.09x = 225,122,633.18
  5. Step 5: Solve for x
    x = 225,122,633.18/13,139.09
  6. Step 6: Final answer
    x = 17,133.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.