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Finding the Fourth Proportional to 13,695.87, 18,900.30 and 7,408.25

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Solution

The fourth proportional to 13,695.87, 18,900.30 and 7,408.25 is: 10,223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.87 : 18,900.30 = 7,408.25 : x
  2. Step 2: Convert to fraction form
    13,695.87/18,900.30 = 7,408.25/x
  3. Step 3: Cross multiply
    13,695.87x = 18,900.30 × 7,408.25
  4. Step 4: Simplify right side
    13,695.87x = 140,018,052.97
  5. Step 5: Solve for x
    x = 140,018,052.97/13,695.87
  6. Step 6: Final answer
    x = 10,223.38

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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.