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Finding the Fourth Proportional to 20,200.57, 30,300.28 and 5,409.50

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Solution

The fourth proportional to 20,200.57, 30,300.28 and 5,409.50 is: 8,114.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,200.57 : 30,300.28 = 5,409.50 : x
  2. Step 2: Convert to fraction form
    20,200.57/30,300.28 = 5,409.50/x
  3. Step 3: Cross multiply
    20,200.57x = 30,300.28 × 5,409.50
  4. Step 4: Simplify right side
    20,200.57x = 163,909,199.63
  5. Step 5: Solve for x
    x = 163,909,199.63/20,200.57
  6. Step 6: Final answer
    x = 8,114.09

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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.