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Finding the Fourth Proportional to 15,046.21, 20,765.57 and 8,758.59

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Solution

The fourth proportional to 15,046.21, 20,765.57 and 8,758.59 is: 12,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,046.21 : 20,765.57 = 8,758.59 : x
  2. Step 2: Convert to fraction form
    15,046.21/20,765.57 = 8,758.59/x
  3. Step 3: Cross multiply
    15,046.21x = 20,765.57 × 8,758.59
  4. Step 4: Simplify right side
    15,046.21x = 181,877,113.75
  5. Step 5: Solve for x
    x = 181,877,113.75/15,046.21
  6. Step 6: Final answer
    x = 12,087.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.