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Finding the Fourth Proportional to 21,552.40, 29,744.04 and 12,120.40

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Solution

The fourth proportional to 21,552.40, 29,744.04 and 12,120.40 is: 16,727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,552.40 : 29,744.04 = 12,120.40 : x
  2. Step 2: Convert to fraction form
    21,552.40/29,744.04 = 12,120.40/x
  3. Step 3: Cross multiply
    21,552.40x = 29,744.04 × 12,120.40
  4. Step 4: Simplify right side
    21,552.40x = 360,509,662.42
  5. Step 5: Solve for x
    x = 360,509,662.42/21,552.40
  6. Step 6: Final answer
    x = 16,727.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.