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Finding the Fourth Proportional to 20,018.88, 30,018.38 and 11,700.98

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Solution

The fourth proportional to 20,018.88, 30,018.38 and 11,700.98 is: 17,545.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.88 : 30,018.38 = 11,700.98 : x
  2. Step 2: Convert to fraction form
    20,018.88/30,018.38 = 11,700.98/x
  3. Step 3: Cross multiply
    20,018.88x = 30,018.38 × 11,700.98
  4. Step 4: Simplify right side
    20,018.88x = 351,244,464.01
  5. Step 5: Solve for x
    x = 351,244,464.01/20,018.88
  6. Step 6: Final answer
    x = 17,545.66

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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.