Home / 13,108.82-18,090.06-7,140.38

Finding the Fourth Proportional to 13,108.82, 18,090.06 and 7,140.38

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Solution

The fourth proportional to 13,108.82, 18,090.06 and 7,140.38 is: 9,853.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.82 : 18,090.06 = 7,140.38 : x
  2. Step 2: Convert to fraction form
    13,108.82/18,090.06 = 7,140.38/x
  3. Step 3: Cross multiply
    13,108.82x = 18,090.06 × 7,140.38
  4. Step 4: Simplify right side
    13,108.82x = 129,169,902.62
  5. Step 5: Solve for x
    x = 129,169,902.62/13,108.82
  6. Step 6: Final answer
    x = 9,853.66

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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.