Home / 13,113.88-18,097.36-7,145.56

Finding the Fourth Proportional to 13,113.88, 18,097.36 and 7,145.56

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Solution

The fourth proportional to 13,113.88, 18,097.36 and 7,145.56 is: 9,860.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.88 : 18,097.36 = 7,145.56 : x
  2. Step 2: Convert to fraction form
    13,113.88/18,097.36 = 7,145.56/x
  3. Step 3: Cross multiply
    13,113.88x = 18,097.36 × 7,145.56
  4. Step 4: Simplify right side
    13,113.88x = 129,315,771.72
  5. Step 5: Solve for x
    x = 129,315,771.72/13,113.88
  6. Step 6: Final answer
    x = 9,860.98

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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.