Home / 21,310.56-31,965.60-9,620.64

Finding the Fourth Proportional to 21,310.56, 31,965.60 and 9,620.64

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Solution

The fourth proportional to 21,310.56, 31,965.60 and 9,620.64 is: 14,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.56 : 31,965.60 = 9,620.64 : x
  2. Step 2: Convert to fraction form
    21,310.56/31,965.60 = 9,620.64/x
  3. Step 3: Cross multiply
    21,310.56x = 31,965.60 × 9,620.64
  4. Step 4: Simplify right side
    21,310.56x = 307,529,529.98
  5. Step 5: Solve for x
    x = 307,529,529.98/21,310.56
  6. Step 6: Final answer
    x = 14,430.85

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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.