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Finding the Fourth Proportional to 13,746.21, 20,619.32 and 7,899.09

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Solution

The fourth proportional to 13,746.21, 20,619.32 and 7,899.09 is: 11,848.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,746.21 : 20,619.32 = 7,899.09 : x
  2. Step 2: Convert to fraction form
    13,746.21/20,619.32 = 7,899.09/x
  3. Step 3: Cross multiply
    13,746.21x = 20,619.32 × 7,899.09
  4. Step 4: Simplify right side
    13,746.21x = 162,873,864.42
  5. Step 5: Solve for x
    x = 162,873,864.42/13,746.21
  6. Step 6: Final answer
    x = 11,848.64

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Half scale
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Double scale
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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.