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Finding the Fourth Proportional to 8,729.40, 13,079.70 and 7,260.60

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Solution

The fourth proportional to 8,729.40, 13,079.70 and 7,260.60 is: 10,878.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.40 : 13,079.70 = 7,260.60 : x
  2. Step 2: Convert to fraction form
    8,729.40/13,079.70 = 7,260.60/x
  3. Step 3: Cross multiply
    8,729.40x = 13,079.70 × 7,260.60
  4. Step 4: Simplify right side
    8,729.40x = 94,966,469.82
  5. Step 5: Solve for x
    x = 94,966,469.82/8,729.40
  6. Step 6: Final answer
    x = 10,878.92

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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.