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Finding the Fourth Proportional to 18,859.90, 28,295.99 and 8,997.89

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Solution

The fourth proportional to 18,859.90, 28,295.99 and 8,997.89 is: 13,499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.90 : 28,295.99 = 8,997.89 : x
  2. Step 2: Convert to fraction form
    18,859.90/28,295.99 = 8,997.89/x
  3. Step 3: Cross multiply
    18,859.90x = 28,295.99 × 8,997.89
  4. Step 4: Simplify right side
    18,859.90x = 254,604,205.46
  5. Step 5: Solve for x
    x = 254,604,205.46/18,859.90
  6. Step 6: Final answer
    x = 13,499.76

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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.