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Finding the Fourth Proportional to 20,267.20, 30,400.80 and 14,653.90

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Solution

The fourth proportional to 20,267.20, 30,400.80 and 14,653.90 is: 21,980.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.20 : 30,400.80 = 14,653.90 : x
  2. Step 2: Convert to fraction form
    20,267.20/30,400.80 = 14,653.90/x
  3. Step 3: Cross multiply
    20,267.20x = 30,400.80 × 14,653.90
  4. Step 4: Simplify right side
    20,267.20x = 445,490,283.12
  5. Step 5: Solve for x
    x = 445,490,283.12/20,267.20
  6. Step 6: Final answer
    x = 21,980.85

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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.