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Finding the Fourth Proportional to 14,765.78, 20,376.01 and 8,391.52

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Solution

The fourth proportional to 14,765.78, 20,376.01 and 8,391.52 is: 11,579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,765.78 : 20,376.01 = 8,391.52 : x
  2. Step 2: Convert to fraction form
    14,765.78/20,376.01 = 8,391.52/x
  3. Step 3: Cross multiply
    14,765.78x = 20,376.01 × 8,391.52
  4. Step 4: Simplify right side
    14,765.78x = 170,985,735.89
  5. Step 5: Solve for x
    x = 170,985,735.89/14,765.78
  6. Step 6: Final answer
    x = 11,579.86

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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.