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Finding the Fourth Proportional to 13,661.36, 20,509.32 and 11,622.32

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Solution

The fourth proportional to 13,661.36, 20,509.32 and 11,622.32 is: 17,448.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.36 : 20,509.32 = 11,622.32 : x
  2. Step 2: Convert to fraction form
    13,661.36/20,509.32 = 11,622.32/x
  3. Step 3: Cross multiply
    13,661.36x = 20,509.32 × 11,622.32
  4. Step 4: Simplify right side
    13,661.36x = 238,365,880.02
  5. Step 5: Solve for x
    x = 238,365,880.02/13,661.36
  6. Step 6: Final answer
    x = 17,448.18

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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.