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Finding the Fourth Proportional to 12,490.30, 18,680.37 and 11,113.30

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Solution

The fourth proportional to 12,490.30, 18,680.37 and 11,113.30 is: 16,620.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.30 : 18,680.37 = 11,113.30 : x
  2. Step 2: Convert to fraction form
    12,490.30/18,680.37 = 11,113.30/x
  3. Step 3: Cross multiply
    12,490.30x = 18,680.37 × 11,113.30
  4. Step 4: Simplify right side
    12,490.30x = 207,600,555.92
  5. Step 5: Solve for x
    x = 207,600,555.92/12,490.30
  6. Step 6: Final answer
    x = 16,620.94

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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.