Home / 13,315.21-18,375.59-7,651.79

Finding the Fourth Proportional to 13,315.21, 18,375.59 and 7,651.79

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Solution

The fourth proportional to 13,315.21, 18,375.59 and 7,651.79 is: 10,559.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.21 : 18,375.59 = 7,651.79 : x
  2. Step 2: Convert to fraction form
    13,315.21/18,375.59 = 7,651.79/x
  3. Step 3: Cross multiply
    13,315.21x = 18,375.59 × 7,651.79
  4. Step 4: Simplify right side
    13,315.21x = 140,606,192.18
  5. Step 5: Solve for x
    x = 140,606,192.18/13,315.21
  6. Step 6: Final answer
    x = 10,559.82

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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.