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Finding the Fourth Proportional to 13,671.77, 20,507.65 and 7,824.31

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Solution

The fourth proportional to 13,671.77, 20,507.65 and 7,824.31 is: 11,736.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.77 : 20,507.65 = 7,824.31 : x
  2. Step 2: Convert to fraction form
    13,671.77/20,507.65 = 7,824.31/x
  3. Step 3: Cross multiply
    13,671.77x = 20,507.65 × 7,824.31
  4. Step 4: Simplify right side
    13,671.77x = 160,458,140.14
  5. Step 5: Solve for x
    x = 160,458,140.14/13,671.77
  6. Step 6: Final answer
    x = 11,736.46

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Similar ratio
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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.