Home / 13,611.08-18,783.35-7,642.64

Finding the Fourth Proportional to 13,611.08, 18,783.35 and 7,642.64

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Solution

The fourth proportional to 13,611.08, 18,783.35 and 7,642.64 is: 10,546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.08 : 18,783.35 = 7,642.64 : x
  2. Step 2: Convert to fraction form
    13,611.08/18,783.35 = 7,642.64/x
  3. Step 3: Cross multiply
    13,611.08x = 18,783.35 × 7,642.64
  4. Step 4: Simplify right side
    13,611.08x = 143,554,249.91
  5. Step 5: Solve for x
    x = 143,554,249.91/13,611.08
  6. Step 6: Final answer
    x = 10,546.87

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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.