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Finding the Fourth Proportional to 21,662.16, 32,493.24 and 13,920.18

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Solution

The fourth proportional to 21,662.16, 32,493.24 and 13,920.18 is: 20,880.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,662.16 : 32,493.24 = 13,920.18 : x
  2. Step 2: Convert to fraction form
    21,662.16/32,493.24 = 13,920.18/x
  3. Step 3: Cross multiply
    21,662.16x = 32,493.24 × 13,920.18
  4. Step 4: Simplify right side
    21,662.16x = 452,311,749.58
  5. Step 5: Solve for x
    x = 452,311,749.58/21,662.16
  6. Step 6: Final answer
    x = 20,880.27

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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.