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Finding the Fourth Proportional to 8,708.60, 12,020.60 and 5,564.80

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Solution

The fourth proportional to 8,708.60, 12,020.60 and 5,564.80 is: 7,681.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.60 : 12,020.60 = 5,564.80 : x
  2. Step 2: Convert to fraction form
    8,708.60/12,020.60 = 5,564.80/x
  3. Step 3: Cross multiply
    8,708.60x = 12,020.60 × 5,564.80
  4. Step 4: Simplify right side
    8,708.60x = 66,892,234.88
  5. Step 5: Solve for x
    x = 66,892,234.88/8,708.60
  6. Step 6: Final answer
    x = 7,681.17

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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.