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Finding the Fourth Proportional to 8,918.60, 13,365.10 and 6,560.20

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Solution

The fourth proportional to 8,918.60, 13,365.10 and 6,560.20 is: 9,830.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.60 : 13,365.10 = 6,560.20 : x
  2. Step 2: Convert to fraction form
    8,918.60/13,365.10 = 6,560.20/x
  3. Step 3: Cross multiply
    8,918.60x = 13,365.10 × 6,560.20
  4. Step 4: Simplify right side
    8,918.60x = 87,677,729.02
  5. Step 5: Solve for x
    x = 87,677,729.02/8,918.60
  6. Step 6: Final answer
    x = 9,830.88

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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.