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Finding the Fourth Proportional to 18,157.52, 25,063.82 and 10,987.81

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Solution

The fourth proportional to 18,157.52, 25,063.82 and 10,987.81 is: 15,167.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,157.52 : 25,063.82 = 10,987.81 : x
  2. Step 2: Convert to fraction form
    18,157.52/25,063.82 = 10,987.81/x
  3. Step 3: Cross multiply
    18,157.52x = 25,063.82 × 10,987.81
  4. Step 4: Simplify right side
    18,157.52x = 275,396,492.03
  5. Step 5: Solve for x
    x = 275,396,492.03/18,157.52
  6. Step 6: Final answer
    x = 15,167.08

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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.