Home / 13,090.14-18,064.62-7,121.85

Finding the Fourth Proportional to 13,090.14, 18,064.62 and 7,121.85

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Solution

The fourth proportional to 13,090.14, 18,064.62 and 7,121.85 is: 9,828.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.14 : 18,064.62 = 7,121.85 : x
  2. Step 2: Convert to fraction form
    13,090.14/18,064.62 = 7,121.85/x
  3. Step 3: Cross multiply
    13,090.14x = 18,064.62 × 7,121.85
  4. Step 4: Simplify right side
    13,090.14x = 128,653,513.95
  5. Step 5: Solve for x
    x = 128,653,513.95/13,090.14
  6. Step 6: Final answer
    x = 9,828.28

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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.