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Finding the Fourth Proportional to 20,551.62, 30,646.98 and 20,364.51

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Solution

The fourth proportional to 20,551.62, 30,646.98 and 20,364.51 is: 30,367.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.62 : 30,646.98 = 20,364.51 : x
  2. Step 2: Convert to fraction form
    20,551.62/30,646.98 = 20,364.51/x
  3. Step 3: Cross multiply
    20,551.62x = 30,646.98 × 20,364.51
  4. Step 4: Simplify right side
    20,551.62x = 624,110,730.68
  5. Step 5: Solve for x
    x = 624,110,730.68/20,551.62
  6. Step 6: Final answer
    x = 30,367.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.