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Finding the Fourth Proportional to 5,615.60, 8,422.72 and 1,918.22

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Solution

The fourth proportional to 5,615.60, 8,422.72 and 1,918.22 is: 2,877.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.60 : 8,422.72 = 1,918.22 : x
  2. Step 2: Convert to fraction form
    5,615.60/8,422.72 = 1,918.22/x
  3. Step 3: Cross multiply
    5,615.60x = 8,422.72 × 1,918.22
  4. Step 4: Simplify right side
    5,615.60x = 16,156,583.05
  5. Step 5: Solve for x
    x = 16,156,583.05/5,615.60
  6. Step 6: Final answer
    x = 2,877.09

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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.