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Finding the Fourth Proportional to 13,649.70, 20,474.55 and 4,415.70

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Solution

The fourth proportional to 13,649.70, 20,474.55 and 4,415.70 is: 6,623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,649.70 : 20,474.55 = 4,415.70 : x
  2. Step 2: Convert to fraction form
    13,649.70/20,474.55 = 4,415.70/x
  3. Step 3: Cross multiply
    13,649.70x = 20,474.55 × 4,415.70
  4. Step 4: Simplify right side
    13,649.70x = 90,409,470.44
  5. Step 5: Solve for x
    x = 90,409,470.44/13,649.70
  6. Step 6: Final answer
    x = 6,623.55

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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.