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Finding the Fourth Proportional to 13,315.23, 18,375.12 and 7,347.12

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Solution

The fourth proportional to 13,315.23, 18,375.12 and 7,347.12 is: 10,139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.23 : 18,375.12 = 7,347.12 : x
  2. Step 2: Convert to fraction form
    13,315.23/18,375.12 = 7,347.12/x
  3. Step 3: Cross multiply
    13,315.23x = 18,375.12 × 7,347.12
  4. Step 4: Simplify right side
    13,315.23x = 135,004,174.92
  5. Step 5: Solve for x
    x = 135,004,174.92/13,315.23
  6. Step 6: Final answer
    x = 10,139.08

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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.