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Finding the Fourth Proportional to 18,018.75, 27,021.24 and 8,656.10

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Solution

The fourth proportional to 18,018.75, 27,021.24 and 8,656.10 is: 12,980.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.75 : 27,021.24 = 8,656.10 : x
  2. Step 2: Convert to fraction form
    18,018.75/27,021.24 = 8,656.10/x
  3. Step 3: Cross multiply
    18,018.75x = 27,021.24 × 8,656.10
  4. Step 4: Simplify right side
    18,018.75x = 233,898,555.56
  5. Step 5: Solve for x
    x = 233,898,555.56/18,018.75
  6. Step 6: Final answer
    x = 12,980.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.