Home / 20,918.42-28,866.77-11,357.85

Finding the Fourth Proportional to 20,918.42, 28,866.77 and 11,357.85

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Solution

The fourth proportional to 20,918.42, 28,866.77 and 11,357.85 is: 15,673.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.42 : 28,866.77 = 11,357.85 : x
  2. Step 2: Convert to fraction form
    20,918.42/28,866.77 = 11,357.85/x
  3. Step 3: Cross multiply
    20,918.42x = 28,866.77 × 11,357.85
  4. Step 4: Simplify right side
    20,918.42x = 327,864,386.86
  5. Step 5: Solve for x
    x = 327,864,386.86/20,918.42
  6. Step 6: Final answer
    x = 15,673.48

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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.