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Finding the Fourth Proportional to 27,980.70, 42,003.45 and 16,899.90

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Solution

The fourth proportional to 27,980.70, 42,003.45 and 16,899.90 is: 25,369.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.70 : 42,003.45 = 16,899.90 : x
  2. Step 2: Convert to fraction form
    27,980.70/42,003.45 = 16,899.90/x
  3. Step 3: Cross multiply
    27,980.70x = 42,003.45 × 16,899.90
  4. Step 4: Simplify right side
    27,980.70x = 709,854,104.66
  5. Step 5: Solve for x
    x = 709,854,104.66/27,980.70
  6. Step 6: Final answer
    x = 25,369.42

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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.