Home / 13,113.82-18,097.28-7,145.48

Finding the Fourth Proportional to 13,113.82, 18,097.28 and 7,145.48

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Solution

The fourth proportional to 13,113.82, 18,097.28 and 7,145.48 is: 9,860.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.82 : 18,097.28 = 7,145.48 : x
  2. Step 2: Convert to fraction form
    13,113.82/18,097.28 = 7,145.48/x
  3. Step 3: Cross multiply
    13,113.82x = 18,097.28 × 7,145.48
  4. Step 4: Simplify right side
    13,113.82x = 129,313,788.61
  5. Step 5: Solve for x
    x = 129,313,788.61/13,113.82
  6. Step 6: Final answer
    x = 9,860.88

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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.