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Finding the Fourth Proportional to 11,709.56, 16,157.00 and 6,928.40

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Solution

The fourth proportional to 11,709.56, 16,157.00 and 6,928.40 is: 9,559.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,709.56 : 16,157.00 = 6,928.40 : x
  2. Step 2: Convert to fraction form
    11,709.56/16,157.00 = 6,928.40/x
  3. Step 3: Cross multiply
    11,709.56x = 16,157.00 × 6,928.40
  4. Step 4: Simplify right side
    11,709.56x = 111,942,124.16
  5. Step 5: Solve for x
    x = 111,942,124.16/11,709.56
  6. Step 6: Final answer
    x = 9,559.89

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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.