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Finding the Fourth Proportional to 13,682.80, 18,882.28 and 7,395.20

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Solution

The fourth proportional to 13,682.80, 18,882.28 and 7,395.20 is: 10,205.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,682.80 : 18,882.28 = 7,395.20 : x
  2. Step 2: Convert to fraction form
    13,682.80/18,882.28 = 7,395.20/x
  3. Step 3: Cross multiply
    13,682.80x = 18,882.28 × 7,395.20
  4. Step 4: Simplify right side
    13,682.80x = 139,638,237.06
  5. Step 5: Solve for x
    x = 139,638,237.06/13,682.80
  6. Step 6: Final answer
    x = 10,205.38

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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.