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Finding the Fourth Proportional to 13,621.99, 18,797.82 and 7,653.91

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Solution

The fourth proportional to 13,621.99, 18,797.82 and 7,653.91 is: 10,562.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.99 : 18,797.82 = 7,653.91 : x
  2. Step 2: Convert to fraction form
    13,621.99/18,797.82 = 7,653.91/x
  3. Step 3: Cross multiply
    13,621.99x = 18,797.82 × 7,653.91
  4. Step 4: Simplify right side
    13,621.99x = 143,876,841.61
  5. Step 5: Solve for x
    x = 143,876,841.61/13,621.99
  6. Step 6: Final answer
    x = 10,562.10

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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.