Home / 18,684.36-25,781.22-11,129.76

Finding the Fourth Proportional to 18,684.36, 25,781.22 and 11,129.76

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Solution

The fourth proportional to 18,684.36, 25,781.22 and 11,129.76 is: 15,357.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684.36 : 25,781.22 = 11,129.76 : x
  2. Step 2: Convert to fraction form
    18,684.36/25,781.22 = 11,129.76/x
  3. Step 3: Cross multiply
    18,684.36x = 25,781.22 × 11,129.76
  4. Step 4: Simplify right side
    18,684.36x = 286,938,791.11
  5. Step 5: Solve for x
    x = 286,938,791.11/18,684.36
  6. Step 6: Final answer
    x = 15,357.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.