Home / 20,617.90-28,452.78-11,186.46

Finding the Fourth Proportional to 20,617.90, 28,452.78 and 11,186.46

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Solution

The fourth proportional to 20,617.90, 28,452.78 and 11,186.46 is: 15,437.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.90 : 28,452.78 = 11,186.46 : x
  2. Step 2: Convert to fraction form
    20,617.90/28,452.78 = 11,186.46/x
  3. Step 3: Cross multiply
    20,617.90x = 28,452.78 × 11,186.46
  4. Step 4: Simplify right side
    20,617.90x = 318,285,885.36
  5. Step 5: Solve for x
    x = 318,285,885.36/20,617.90
  6. Step 6: Final answer
    x = 15,437.36

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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.