Home / 13,135.89-18,128.03-7,471.15

Finding the Fourth Proportional to 13,135.89, 18,128.03 and 7,471.15

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Solution

The fourth proportional to 13,135.89, 18,128.03 and 7,471.15 is: 10,310.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.89 : 18,128.03 = 7,471.15 : x
  2. Step 2: Convert to fraction form
    13,135.89/18,128.03 = 7,471.15/x
  3. Step 3: Cross multiply
    13,135.89x = 18,128.03 × 7,471.15
  4. Step 4: Simplify right side
    13,135.89x = 135,437,231.33
  5. Step 5: Solve for x
    x = 135,437,231.33/13,135.89
  6. Step 6: Final answer
    x = 10,310.48

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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.