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Finding the Fourth Proportional to 8,653.20, 12,983.90 and 4,490.99

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Solution

The fourth proportional to 8,653.20, 12,983.90 and 4,490.99 is: 6,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.20 : 12,983.90 = 4,490.99 : x
  2. Step 2: Convert to fraction form
    8,653.20/12,983.90 = 4,490.99/x
  3. Step 3: Cross multiply
    8,653.20x = 12,983.90 × 4,490.99
  4. Step 4: Simplify right side
    8,653.20x = 58,310,477.69
  5. Step 5: Solve for x
    x = 58,310,477.69/8,653.20
  6. Step 6: Final answer
    x = 6,738.60

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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.