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Finding the Fourth Proportional to 12,622.98, 17,420.07 and 7,245.89

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Solution

The fourth proportional to 12,622.98, 17,420.07 and 7,245.89 is: 9,999.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,622.98 : 17,420.07 = 7,245.89 : x
  2. Step 2: Convert to fraction form
    12,622.98/17,420.07 = 7,245.89/x
  3. Step 3: Cross multiply
    12,622.98x = 17,420.07 × 7,245.89
  4. Step 4: Simplify right side
    12,622.98x = 126,223,823.91
  5. Step 5: Solve for x
    x = 126,223,823.91/12,622.98
  6. Step 6: Final answer
    x = 9,999.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.