Home / 13,149.39-18,145.64-7,181.06

Finding the Fourth Proportional to 13,149.39, 18,145.64 and 7,181.06

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Solution

The fourth proportional to 13,149.39, 18,145.64 and 7,181.06 is: 9,909.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.39 : 18,145.64 = 7,181.06 : x
  2. Step 2: Convert to fraction form
    13,149.39/18,145.64 = 7,181.06/x
  3. Step 3: Cross multiply
    13,149.39x = 18,145.64 × 7,181.06
  4. Step 4: Simplify right side
    13,149.39x = 130,304,929.58
  5. Step 5: Solve for x
    x = 130,304,929.58/13,149.39
  6. Step 6: Final answer
    x = 9,909.58

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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.