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Finding the Fourth Proportional to 18,300.84, 25,255.62 and 11,231.16

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Solution

The fourth proportional to 18,300.84, 25,255.62 and 11,231.16 is: 15,499.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,300.84 : 25,255.62 = 11,231.16 : x
  2. Step 2: Convert to fraction form
    18,300.84/25,255.62 = 11,231.16/x
  3. Step 3: Cross multiply
    18,300.84x = 25,255.62 × 11,231.16
  4. Step 4: Simplify right side
    18,300.84x = 283,649,909.12
  5. Step 5: Solve for x
    x = 283,649,909.12/18,300.84
  6. Step 6: Final answer
    x = 15,499.28

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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.