Home / 20,918.23-28,866.80-11,486.72

Finding the Fourth Proportional to 20,918.23, 28,866.80 and 11,486.72

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Solution

The fourth proportional to 20,918.23, 28,866.80 and 11,486.72 is: 15,851.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.23 : 28,866.80 = 11,486.72 : x
  2. Step 2: Convert to fraction form
    20,918.23/28,866.80 = 11,486.72/x
  3. Step 3: Cross multiply
    20,918.23x = 28,866.80 × 11,486.72
  4. Step 4: Simplify right side
    20,918.23x = 331,584,791.46
  5. Step 5: Solve for x
    x = 331,584,791.46/20,918.23
  6. Step 6: Final answer
    x = 15,851.48

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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.