Home / 20,918.86-28,862.87-11,844.43

Finding the Fourth Proportional to 20,918.86, 28,862.87 and 11,844.43

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Solution

The fourth proportional to 20,918.86, 28,862.87 and 11,844.43 is: 16,342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.86 : 28,862.87 = 11,844.43 : x
  2. Step 2: Convert to fraction form
    20,918.86/28,862.87 = 11,844.43/x
  3. Step 3: Cross multiply
    20,918.86x = 28,862.87 × 11,844.43
  4. Step 4: Simplify right side
    20,918.86x = 341,864,111.93
  5. Step 5: Solve for x
    x = 341,864,111.93/20,918.86
  6. Step 6: Final answer
    x = 16,342.39

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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.