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Finding the Fourth Proportional to 17,988.30, 26,988.93 and 8,120.07

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Solution

The fourth proportional to 17,988.30, 26,988.93 and 8,120.07 is: 12,183.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,988.30 : 26,988.93 = 8,120.07 : x
  2. Step 2: Convert to fraction form
    17,988.30/26,988.93 = 8,120.07/x
  3. Step 3: Cross multiply
    17,988.30x = 26,988.93 × 8,120.07
  4. Step 4: Simplify right side
    17,988.30x = 219,152,000.83
  5. Step 5: Solve for x
    x = 219,152,000.83/17,988.30
  6. Step 6: Final answer
    x = 12,183.03

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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.