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Finding the Fourth Proportional to 20,219.60, 30,300.60 and 14,913.20

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Solution

The fourth proportional to 20,219.60, 30,300.60 and 14,913.20 is: 22,348.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.60 : 30,300.60 = 14,913.20 : x
  2. Step 2: Convert to fraction form
    20,219.60/30,300.60 = 14,913.20/x
  3. Step 3: Cross multiply
    20,219.60x = 30,300.60 × 14,913.20
  4. Step 4: Simplify right side
    20,219.60x = 451,878,907.92
  5. Step 5: Solve for x
    x = 451,878,907.92/20,219.60
  6. Step 6: Final answer
    x = 22,348.56

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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.