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Finding the Fourth Proportional to 12,470.62, 18,705.94 and 7,272.85

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Solution

The fourth proportional to 12,470.62, 18,705.94 and 7,272.85 is: 10,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,470.62 : 18,705.94 = 7,272.85 : x
  2. Step 2: Convert to fraction form
    12,470.62/18,705.94 = 7,272.85/x
  3. Step 3: Cross multiply
    12,470.62x = 18,705.94 × 7,272.85
  4. Step 4: Simplify right side
    12,470.62x = 136,045,495.73
  5. Step 5: Solve for x
    x = 136,045,495.73/12,470.62
  6. Step 6: Final answer
    x = 10,909.28

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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.