Home / 20,617.89-28,452.87-11,186.64

Finding the Fourth Proportional to 20,617.89, 28,452.87 and 11,186.64

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Solution

The fourth proportional to 20,617.89, 28,452.87 and 11,186.64 is: 15,437.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.89 : 28,452.87 = 11,186.64 : x
  2. Step 2: Convert to fraction form
    20,617.89/28,452.87 = 11,186.64/x
  3. Step 3: Cross multiply
    20,617.89x = 28,452.87 × 11,186.64
  4. Step 4: Simplify right side
    20,617.89x = 318,292,013.66
  5. Step 5: Solve for x
    x = 318,292,013.66/20,617.89
  6. Step 6: Final answer
    x = 15,437.66

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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.