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Finding the Fourth Proportional to 13,612.63, 20,414.63 and 4,376.47

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Solution

The fourth proportional to 13,612.63, 20,414.63 and 4,376.47 is: 6,563.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.63 : 20,414.63 = 4,376.47 : x
  2. Step 2: Convert to fraction form
    13,612.63/20,414.63 = 4,376.47/x
  3. Step 3: Cross multiply
    13,612.63x = 20,414.63 × 4,376.47
  4. Step 4: Simplify right side
    13,612.63x = 89,343,993.87
  5. Step 5: Solve for x
    x = 89,343,993.87/13,612.63
  6. Step 6: Final answer
    x = 6,563.32

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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.