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Finding the Fourth Proportional to 13,612.92, 20,410.50 and 5,720.49

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Solution

The fourth proportional to 13,612.92, 20,410.50 and 5,720.49 is: 8,577.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.92 : 20,410.50 = 5,720.49 : x
  2. Step 2: Convert to fraction form
    13,612.92/20,410.50 = 5,720.49/x
  3. Step 3: Cross multiply
    13,612.92x = 20,410.50 × 5,720.49
  4. Step 4: Simplify right side
    13,612.92x = 116,758,061.15
  5. Step 5: Solve for x
    x = 116,758,061.15/13,612.92
  6. Step 6: Final answer
    x = 8,577.00

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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.