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Finding the Fourth Proportional to 13,653.72, 18,843.08 and 7,685.88

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Solution

The fourth proportional to 13,653.72, 18,843.08 and 7,685.88 is: 10,607.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,653.72 : 18,843.08 = 7,685.88 : x
  2. Step 2: Convert to fraction form
    13,653.72/18,843.08 = 7,685.88/x
  3. Step 3: Cross multiply
    13,653.72x = 18,843.08 × 7,685.88
  4. Step 4: Simplify right side
    13,653.72x = 144,825,651.71
  5. Step 5: Solve for x
    x = 144,825,651.71/13,653.72
  6. Step 6: Final answer
    x = 10,607.05

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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.