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Finding the Fourth Proportional to 13,315.70, 18,375.73 and 7,347.37

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Solution

The fourth proportional to 13,315.70, 18,375.73 and 7,347.37 is: 10,139.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.70 : 18,375.73 = 7,347.37 : x
  2. Step 2: Convert to fraction form
    13,315.70/18,375.73 = 7,347.37/x
  3. Step 3: Cross multiply
    13,315.70x = 18,375.73 × 7,347.37
  4. Step 4: Simplify right side
    13,315.70x = 135,013,287.33
  5. Step 5: Solve for x
    x = 135,013,287.33/13,315.70
  6. Step 6: Final answer
    x = 10,139.41

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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.