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Finding the Fourth Proportional to 13,649.45, 20,473.97 and 4,415.45

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Solution

The fourth proportional to 13,649.45, 20,473.97 and 4,415.45 is: 6,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,649.45 : 20,473.97 = 4,415.45 : x
  2. Step 2: Convert to fraction form
    13,649.45/20,473.97 = 4,415.45/x
  3. Step 3: Cross multiply
    13,649.45x = 20,473.97 × 4,415.45
  4. Step 4: Simplify right side
    13,649.45x = 90,401,666.39
  5. Step 5: Solve for x
    x = 90,401,666.39/13,649.45
  6. Step 6: Final answer
    x = 6,623.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.