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Finding the Fourth Proportional to 12,490.98, 18,727.21 and 7,559.45

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Solution

The fourth proportional to 12,490.98, 18,727.21 and 7,559.45 is: 11,333.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.98 : 18,727.21 = 7,559.45 : x
  2. Step 2: Convert to fraction form
    12,490.98/18,727.21 = 7,559.45/x
  3. Step 3: Cross multiply
    12,490.98x = 18,727.21 × 7,559.45
  4. Step 4: Simplify right side
    12,490.98x = 141,567,351.15
  5. Step 5: Solve for x
    x = 141,567,351.15/12,490.98
  6. Step 6: Final answer
    x = 11,333.56

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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.