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Finding the Fourth Proportional to 12,605.90, 18,903.27 and 4,809.26

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Solution

The fourth proportional to 12,605.90, 18,903.27 and 4,809.26 is: 7,211.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.90 : 18,903.27 = 4,809.26 : x
  2. Step 2: Convert to fraction form
    12,605.90/18,903.27 = 4,809.26/x
  3. Step 3: Cross multiply
    12,605.90x = 18,903.27 × 4,809.26
  4. Step 4: Simplify right side
    12,605.90x = 90,910,740.28
  5. Step 5: Solve for x
    x = 90,910,740.28/12,605.90
  6. Step 6: Final answer
    x = 7,211.76

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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.