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Finding the Fourth Proportional to 17,765.80, 26,648.70 and 11,890.60

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Solution

The fourth proportional to 17,765.80, 26,648.70 and 11,890.60 is: 17,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,765.80 : 26,648.70 = 11,890.60 : x
  2. Step 2: Convert to fraction form
    17,765.80/26,648.70 = 11,890.60/x
  3. Step 3: Cross multiply
    17,765.80x = 26,648.70 × 11,890.60
  4. Step 4: Simplify right side
    17,765.80x = 316,869,032.22
  5. Step 5: Solve for x
    x = 316,869,032.22/17,765.80
  6. Step 6: Final answer
    x = 17,835.90

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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.