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Finding the Fourth Proportional to 8,469.40, 11,687.40 and 4,932.40

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Solution

The fourth proportional to 8,469.40, 11,687.40 and 4,932.40 is: 6,806.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.40 : 11,687.40 = 4,932.40 : x
  2. Step 2: Convert to fraction form
    8,469.40/11,687.40 = 4,932.40/x
  3. Step 3: Cross multiply
    8,469.40x = 11,687.40 × 4,932.40
  4. Step 4: Simplify right side
    8,469.40x = 57,646,931.76
  5. Step 5: Solve for x
    x = 57,646,931.76/8,469.40
  6. Step 6: Final answer
    x = 6,806.50

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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.