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Finding the Fourth Proportional to 20,539.94, 30,809.92 and 4,957.57

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Solution

The fourth proportional to 20,539.94, 30,809.92 and 4,957.57 is: 7,436.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.94 : 30,809.92 = 4,957.57 : x
  2. Step 2: Convert to fraction form
    20,539.94/30,809.92 = 4,957.57/x
  3. Step 3: Cross multiply
    20,539.94x = 30,809.92 × 4,957.57
  4. Step 4: Simplify right side
    20,539.94x = 152,742,245.68
  5. Step 5: Solve for x
    x = 152,742,245.68/20,539.94
  6. Step 6: Final answer
    x = 7,436.35

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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.