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Finding the Fourth Proportional to 8,728.40, 13,073.40 and 8,536.40

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Solution

The fourth proportional to 8,728.40, 13,073.40 and 8,536.40 is: 12,785.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.40 : 13,073.40 = 8,536.40 : x
  2. Step 2: Convert to fraction form
    8,728.40/13,073.40 = 8,536.40/x
  3. Step 3: Cross multiply
    8,728.40x = 13,073.40 × 8,536.40
  4. Step 4: Simplify right side
    8,728.40x = 111,599,771.76
  5. Step 5: Solve for x
    x = 111,599,771.76/8,728.40
  6. Step 6: Final answer
    x = 12,785.82

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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.